864526140 has 72 divisors (see below), whose sum is σ = 2707006848. Its totient is φ = 223102080.

The previous prime is 864526121. The next prime is 864526183. The reversal of 864526140 is 41625468.

864526140 is a `hidden beast` number, since 8 + 645 + 2 + 6 + 1 + 4 + 0 = 666.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 864526095 and 864526104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71887 + ... + 83046.

Almost surely, 2^864526140 is an apocalyptic number.

It is an amenable number.

864526140 is an abundant number, since it is smaller than the sum of its proper divisors (1842480708).

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

864526140 is a wasteful number, since it uses less digits than its factorization.

864526140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154979 (or 154974 counting only the distinct ones).

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

The square root of 864526140 is about 29402.8253744432. The cubic root of 864526140 is about 952.6339241702.

The spelling of 864526140 in words is "eight hundred sixty-four million, five hundred twenty-six thousand, one hundred forty".