40025408 has 14 divisors (see below), whose sum is σ = 79425546. Its totient is φ = 20012672.

The previous prime is 40025399. The next prime is 40025411. The reversal of 40025408 is 80452004.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 16908544 = 4808^2 + 4112^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312635 + ... + 312762.

Almost surely, 2^40025408 is an apocalyptic number.

It is an amenable number.

40025408 is a deficient number, since it is larger than the sum of its proper divisors (39400138).

40025408 is an equidigital number, since it uses as much as digits as its factorization.

40025408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625409 (or 625399 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40025408 is about 6326.5636802296. The cubic root of 40025408 is about 342.0675857902.

The spelling of 40025408 in words is "forty million, twenty-five thousand, four hundred eight".