40377664 has 14 divisors (see below), whose sum is σ = 80124554. Its totient is φ = 20188800.

The previous prime is 40377647. The next prime is 40377677. The reversal of 40377664 is 46677304.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 1937664 = 6200^2 + 1392^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315387 + ... + 315514.

Almost surely, 2^40377664 is an apocalyptic number.

It is an amenable number.

40377664 is a deficient number, since it is larger than the sum of its proper divisors (39746890).

40377664 is an equidigital number, since it uses as much as digits as its factorization.

40377664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630913 (or 630903 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 40377664 is about 6354.3421374679. The cubic root of 40377664 is about 343.0681468351.

It can be divided in two parts, 40377 and 664, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 40377664 in words is "forty million, three hundred seventy-seven thousand, six hundred sixty-four".