891130040 has 32 divisors (see below), whose sum is σ = 2006046000. Its totient is φ = 356273664.

The previous prime is 891130027. The next prime is 891130043. The reversal of 891130040 is 40031198.

It is a super-2 number, since 2×891130040² = 1588225496380803200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 891129991 and 891130009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891130043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100091 + ... + 108629.

Almost surely, 2^891130040 is an apocalyptic number.

It is an amenable number.

891130040 is an abundant number, since it is smaller than the sum of its proper divisors (1114915960).

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

891130040 is a wasteful number, since it uses less digits than its factorization.

891130040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11159 (or 11155 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 891130040 is about 29851.8012856846. The cubic root of 891130040 is about 962.3071101630.

The spelling of 891130040 in words is "eight hundred ninety-one million, one hundred thirty thousand, forty".