87305690 has 16 divisors (see below), whose sum is σ = 159496992. Its totient is φ = 34400784.

The previous prime is 87305683. The next prime is 87305711. The reversal of 87305690 is 9650378.

It is a super-2 number, since 2×87305690² = 15244567012752200, which contains 22 as substring.

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, 64484 + ... + 65823.

It is an arithmetic number, because the mean of its divisors is an integer number (9968562).

Almost surely, 2^87305690 is an apocalyptic number.

87305690 is a deficient number, since it is larger than the sum of its proper divisors (72191302).

87305690 is a wasteful number, since it uses less digits than its factorization.

87305690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130381.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 87305690 is about 9343.7513879598. The cubic root of 87305690 is about 443.6231313570.

The spelling of 87305690 in words is "eighty-seven million, three hundred five thousand, six hundred ninety".