40642465 has 8 divisors (see below), whose sum is σ = 50089320. Its totient is φ = 31635072.

The previous prime is 40642447. The next prime is 40642471. The reversal of 40642465 is 56424604.

It can be written as a sum of positive squares in 4 ways, for example, as 23203489 + 17438976 = 4817^2 + 4176^2 .

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 40642465 - 2⁷ = 40642337 is a prime.

It is a super-2 number, since 2×40642465² = 3303619922552450, which contains 22 as substring.

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, 109660 + ... + 110029.

It is an arithmetic number, because the mean of its divisors is an integer number (6261165).

Almost surely, 2^40642465 is an apocalyptic number.

It is an amenable number.

40642465 is a deficient number, since it is larger than the sum of its proper divisors (9446855).

40642465 is a wasteful number, since it uses less digits than its factorization.

40642465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219731.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40642465 is about 6375.1443120921. The cubic root of 40642465 is about 343.8164724344.

The spelling of 40642465 in words is "forty million, six hundred forty-two thousand, four hundred sixty-five".