87064770 has 32 divisors (see below), whose sum is σ = 225029952. Its totient is φ = 21431232.

The previous prime is 87064721. The next prime is 87064777. The reversal of 87064770 is 7746078.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87064777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111232 + ... + 112011.

It is an arithmetic number, because the mean of its divisors is an integer number (7032186).

Almost surely, 2^87064770 is an apocalyptic number.

87064770 is an abundant number, since it is smaller than the sum of its proper divisors (137965182).

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

87064770 is a wasteful number, since it uses less digits than its factorization.

87064770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223266.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 87064770 is about 9330.8504435555. The cubic root of 87064770 is about 443.2146961778.

The spelling of 87064770 in words is "eighty-seven million, sixty-four thousand, seven hundred seventy".