1951985952 has 432 divisors, whose sum is σ = 6901614720. Its totient is φ = 540836352.

The previous prime is 1951985947. The next prime is 1951985953. The reversal of 1951985952 is 2595891591.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1951985953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17908074 + ... + 17908182.

It is an arithmetic number, because the mean of its divisors is an integer number (15975960).

Almost surely, 2^1951985952 is an apocalyptic number.

1951985952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951985952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3450807360).

1951985952 is an abundant number, since it is smaller than the sum of its proper divisors (4949628768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1951985952 is a wasteful number, since it uses less digits than its factorization.

1951985952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 168 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 54.

The square root of 1951985952 is about 44181.2850876930. The cubic root of 1951985952 is about 1249.7569558400.

The spelling of 1951985952 in words is "one billion, nine hundred fifty-one million, nine hundred eighty-five thousand, nine hundred fifty-two".