891604040 has 32 divisors (see below), whose sum is σ = 2055042360. Its totient is φ = 347942400.

The previous prime is 891604031. The next prime is 891604067. The reversal of 891604040 is 40406198.

It can be written as a sum of positive squares in 4 ways, for example, as 444450724 + 447153316 = 21082^2 + 21146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 891603988 and 891604006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270191 + ... + 273470.

Almost surely, 2^891604040 is an apocalyptic number.

It is an amenable number.

891604040 is an abundant number, since it is smaller than the sum of its proper divisors (1163438320).

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

891604040 is a wasteful number, since it uses less digits than its factorization.

891604040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543713 (or 543709 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 891604040 is about 29859.7394496335. The cubic root of 891604040 is about 962.4776998263.

The spelling of 891604040 in words is "eight hundred ninety-one million, six hundred four thousand, forty".