40372428 has 12 divisors (see below), whose sum is σ = 94202360. Its totient is φ = 13457472.

The previous prime is 40372421. The next prime is 40372441. The reversal of 40372428 is 82427304.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-4 number, since 4×40372428⁴ (a number of 32 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40372395 and 40372404.

It is not an unprimeable number, because it can be changed into a prime (40372421) 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, 1682173 + ... + 1682196.

Almost surely, 2^40372428 is an apocalyptic number.

It is an amenable number.

40372428 is an abundant number, since it is smaller than the sum of its proper divisors (53829932).

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

40372428 is a wasteful number, since it uses less digits than its factorization.

40372428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364376 (or 3364374 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 40372428 is about 6353.9301223731. The cubic root of 40372428 is about 343.0533169986.

The spelling of 40372428 in words is "forty million, three hundred seventy-two thousand, four hundred twenty-eight".