38645940 has 48 divisors (see below), whose sum is σ = 109992960. Its totient is φ = 10135680.

The previous prime is 38645927. The next prime is 38645941. The reversal of 38645940 is 4954683.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38645941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1620 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (2291520).

Almost surely, 2^38645940 is an apocalyptic number.

38645940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38645940 is an abundant number, since it is smaller than the sum of its proper divisors (71347020).

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

38645940 is a wasteful number, since it uses less digits than its factorization.

38645940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10630 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 38645940 is about 6216.5858797253. The cubic root of 38645940 is about 338.0917902496.

The spelling of 38645940 in words is "thirty-eight million, six hundred forty-five thousand, nine hundred forty".