40097320 has 16 divisors (see below), whose sum is σ = 90219060. Its totient is φ = 16038912.

The previous prime is 40097311. The next prime is 40097327. The reversal of 40097320 is 2379004.

It can be written as a sum of positive squares in 2 ways, for example, as 38613796 + 1483524 = 6214^2 + 1218^2 .

It is not an unprimeable number, because it can be changed into a prime (40097327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501177 + ... + 501256.

Almost surely, 2^40097320 is an apocalyptic number.

40097320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40097320 is an abundant number, since it is smaller than the sum of its proper divisors (50121740).

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

40097320 is a wasteful number, since it uses less digits than its factorization.

40097320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002444 (or 1002440 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 40097320 is about 6332.2444678013. The cubic root of 40097320 is about 342.2723228000.

The spelling of 40097320 in words is "forty million, ninety-seven thousand, three hundred twenty".