88640465 has 8 divisors (see below), whose sum is σ = 112625640. Its totient is φ = 66740992.

The previous prime is 88640437. The next prime is 88640521. The reversal of 88640465 is 56404688.

It can be written as a sum of positive squares in 4 ways, for example, as 24512401 + 64128064 = 4951^2 + 8008^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 88640465 - 2²² = 84446161 is a prime.

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, 521330 + ... + 521499.

It is an arithmetic number, because the mean of its divisors is an integer number (14078205).

Almost surely, 2^88640465 is an apocalyptic number.

88640465 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

88640465 is a deficient number, since it is larger than the sum of its proper divisors (23985175).

88640465 is a wasteful number, since it uses less digits than its factorization.

88640465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042851.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 88640465 is about 9414.9065316656. The cubic root of 88640465 is about 445.8724876279.

The spelling of 88640465 in words is "eighty-eight million, six hundred forty thousand, four hundred sixty-five".