61864452 has 96 divisors (see below), whose sum is σ = 174518400. Its totient is φ = 18838656.

The previous prime is 61864427. The next prime is 61864463. The reversal of 61864452 is 25446816.

61864452 is a `hidden beast` number, since 6 + 1 + 8 + 644 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194998 + ... + 195314.

It is an arithmetic number, because the mean of its divisors is an integer number (1817900).

Almost surely, 2^61864452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61864452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87259200).

61864452 is an abundant number, since it is smaller than the sum of its proper divisors (112653948).

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

61864452 is a wasteful number, since it uses less digits than its factorization.

61864452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 474 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 61864452 is about 7865.3958578065. The cubic root of 61864452 is about 395.5005181015.

The spelling of 61864452 in words is "sixty-one million, eight hundred sixty-four thousand, four hundred fifty-two".