87213070 has 64 divisors (see below), whose sum is σ = 186310656. Its totient is φ = 28771200.

The previous prime is 87213053. The next prime is 87213131. The reversal of 87213070 is 7031278.

It is a happy number.

It is a super-2 number, since 2×87213070² = 15212239157649800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390979 + ... + 391201.

It is an arithmetic number, because the mean of its divisors is an integer number (2911104).

Almost surely, 2^87213070 is an apocalyptic number.

87213070 is an abundant number, since it is smaller than the sum of its proper divisors (99097586).

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

87213070 is a wasteful number, since it uses less digits than its factorization.

87213070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 87213070 is about 9338.7938193323. The cubic root of 87213070 is about 443.4662003376.

The spelling of 87213070 in words is "eighty-seven million, two hundred thirteen thousand, seventy".