38621940 has 48 divisors (see below), whose sum is σ = 123591552. Its totient is φ = 8827776.

The previous prime is 38621929. The next prime is 38621951. The reversal of 38621940 is 4912683.

38621940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (38621929) and next prime (38621951).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45559 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (2574824).

Almost surely, 2^38621940 is an apocalyptic number.

38621940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38621940 is an abundant number, since it is smaller than the sum of its proper divisors (84969612).

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

38621940 is a wasteful number, since it uses less digits than its factorization.

38621940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91976 (or 91974 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 38621940 is about 6214.6552599481. The cubic root of 38621940 is about 338.0217882153.

The spelling of 38621940 in words is "thirty-eight million, six hundred twenty-one thousand, nine hundred forty".