87651020 has 24 divisors (see below), whose sum is σ = 184391424. Its totient is φ = 34998656.

The previous prime is 87651017. The next prime is 87651023. The reversal of 87651020 is 2015678.

It is an interprime number because it is at equal distance from previous prime (87651017) and next prime (87651023).

It is not an unprimeable number, because it can be changed into a prime (87651023) 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, 8789 + ... + 15891.

It is an arithmetic number, because the mean of its divisors is an integer number (7682976).

Almost surely, 2^87651020 is an apocalyptic number.

It is an amenable number.

87651020 is an abundant number, since it is smaller than the sum of its proper divisors (96740404).

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

87651020 is a wasteful number, since it uses less digits than its factorization.

87651020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729 (or 7727 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 87651020 is about 9362.2123453808. The cubic root of 87651020 is about 444.2072659982.

Adding to 87651020 its reverse (2015678), we get a palindrome (89666698).

The spelling of 87651020 in words is "eighty-seven million, six hundred fifty-one thousand, twenty".