40428344 has 32 divisors (see below), whose sum is σ = 82963440. Its totient is φ = 18316800.

The previous prime is 40428301. The next prime is 40428359. The reversal of 40428344 is 44382404.

It is a congruent number.

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, 37574 + ... + 38634.

Almost surely, 2^40428344 is an apocalyptic number.

40428344 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40428344 is an abundant number, since it is smaller than the sum of its proper divisors (42535096).

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

40428344 is a wasteful number, since it uses less digits than its factorization.

40428344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The square root of 40428344 is about 6358.3287112259. The cubic root of 40428344 is about 343.2116207489.

The spelling of 40428344 in words is "forty million, four hundred twenty-eight thousand, three hundred forty-four".