88401690 has 48 divisors (see below), whose sum is σ = 247528008. Its totient is φ = 21760128.

The previous prime is 88401671. The next prime is 88401763. The reversal of 88401690 is 9610488.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72743841 + 15657849 = 8529^2 + 3957^2 .

It is a super-2 number, since 2×88401690² = 15629717589712200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36609 + ... + 38948.

Almost surely, 2^88401690 is an apocalyptic number.

88401690 is an abundant number, since it is smaller than the sum of its proper divisors (159126318).

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

88401690 is a wasteful number, since it uses less digits than its factorization.

88401690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75583 (or 75580 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 88401690 is about 9402.2172916818. The cubic root of 88401690 is about 445.4717716888.

The spelling of 88401690 in words is "eighty-eight million, four hundred one thousand, six hundred ninety".