40038897 has 4 divisors (see below), whose sum is σ = 53385200. Its totient is φ = 26692596.

The previous prime is 40038839. The next prime is 40038907. The reversal of 40038897 is 79883004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40038897 - 2⁷ = 40038769 is a prime.

It is a super-2 number, since 2×40038897² = 3206226545953218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40038197) 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, 6673147 + ... + 6673152.

It is an arithmetic number, because the mean of its divisors is an integer number (13346300).

Almost surely, 2^40038897 is an apocalyptic number.

It is an amenable number.

40038897 is a deficient number, since it is larger than the sum of its proper divisors (13346303).

40038897 is a wasteful number, since it uses less digits than its factorization.

40038897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346302.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40038897 is about 6327.6296509831. The cubic root of 40038897 is about 342.1060083127.

The spelling of 40038897 in words is "forty million, thirty-eight thousand, eight hundred ninety-seven".