1878399572 has 48 divisors (see below), whose sum is σ = 3912830208. Its totient is φ = 772208640.

The previous prime is 1878399559. The next prime is 1878399583. The reversal of 1878399572 is 2759938781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60788 + ... + 86324.

It is an arithmetic number, because the mean of its divisors is an integer number (81517296).

Almost surely, 2^1878399572 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 1878399572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956415104).

1878399572 is an abundant number, since it is smaller than the sum of its proper divisors (2034430636).

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

1878399572 is a wasteful number, since it uses less digits than its factorization.

1878399572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25656 (or 25654 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 59.

The square root of 1878399572 is about 43340.5072882171. The cubic root of 1878399572 is about 1233.8508374806.

The spelling of 1878399572 in words is "one billion, eight hundred seventy-eight million, three hundred ninety-nine thousand, five hundred seventy-two".