40386428 has 12 divisors (see below), whose sum is σ = 72956352. Its totient is φ = 19541760.

The previous prime is 40386421. The next prime is 40386431. The reversal of 40386428 is 82468304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40386421) 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, 162725 + ... + 162972.

It is an arithmetic number, because the mean of its divisors is an integer number (6079696).

Almost surely, 2^40386428 is an apocalyptic number.

It is an amenable number.

40386428 is a deficient number, since it is larger than the sum of its proper divisors (32569924).

40386428 is a wasteful number, since it uses less digits than its factorization.

40386428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325732 (or 325730 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 40386428 is about 6355.0317072380. The cubic root of 40386428 is about 343.0929660993.

The spelling of 40386428 in words is "forty million, three hundred eighty-six thousand, four hundred twenty-eight".