88440729 has 16 divisors (see below), whose sum is σ = 129390912. Its totient is φ = 53396928.

The previous prime is 88440721. The next prime is 88440739. The reversal of 88440729 is 92704488.

It is not a de Polignac number, because 88440729 - 2³ = 88440721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (88440721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19327 + ... + 23460.

It is an arithmetic number, because the mean of its divisors is an integer number (8086932).

Almost surely, 2^88440729 is an apocalyptic number.

It is an amenable number.

88440729 is a deficient number, since it is larger than the sum of its proper divisors (40950183).

88440729 is a wasteful number, since it uses less digits than its factorization.

88440729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42856.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 88440729 is about 9404.2931153809. The cubic root of 88440729 is about 445.5373368499.

The spelling of 88440729 in words is "eighty-eight million, four hundred forty thousand, seven hundred twenty-nine".