40401944 has 16 divisors (see below), whose sum is σ = 82640520. Its totient is φ = 18364480.

The previous prime is 40401941. The next prime is 40401971. The reversal of 40401944 is 44910404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401941) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 229469 + ... + 229644.

Almost surely, 2^40401944 is an apocalyptic number.

40401944 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40401944 is an abundant number, since it is smaller than the sum of its proper divisors (42238576).

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

40401944 is a wasteful number, since it uses less digits than its factorization.

40401944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459130 (or 459126 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40401944 is about 6356.2523549651. The cubic root of 40401944 is about 343.1368979277.

The spelling of 40401944 in words is "forty million, four hundred one thousand, nine hundred forty-four".