891040432 has 10 divisors (see below), whose sum is σ = 1726390868. Its totient is φ = 445520208.

The previous prime is 891040427. The next prime is 891040463. The reversal of 891040432 is 234040198.

It is a junction number, because it is equal to n+sod(n) for n = 891040394 and 891040403.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27844998 + ... + 27845029.

Almost surely, 2^891040432 is an apocalyptic number.

It is an amenable number.

891040432 is a deficient number, since it is larger than the sum of its proper divisors (835350436).

891040432 is a wasteful number, since it uses less digits than its factorization.

891040432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55690035 (or 55690029 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 891040432 is about 29850.3003669980. The cubic root of 891040432 is about 962.2748540006.

The spelling of 891040432 in words is "eight hundred ninety-one million, forty thousand, four hundred thirty-two".