88909440 has 64 divisors (see below), whose sum is σ = 283404960. Its totient is φ = 23708672.

The previous prime is 88909433. The next prime is 88909441. The reversal of 88909440 is 4490988.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×88909440² = 15809777042227200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 88909392 and 88909401.

It is not an unprimeable number, because it can be changed into a prime (88909441) 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, 21234 + ... + 25073.

Almost surely, 2^88909440 is an apocalyptic number.

88909440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

88909440 is an abundant number, since it is smaller than the sum of its proper divisors (194495520).

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

88909440 is a wasteful number, since it uses less digits than its factorization.

88909440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46329 (or 46317 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 88909440 is about 9429.1802400845. The cubic root of 88909440 is about 446.3230247152.

The spelling of 88909440 in words is "eighty-eight million, nine hundred nine thousand, four hundred forty".