38969640 has 64 divisors (see below), whose sum is σ = 129902400. Its totient is φ = 10391616.

The previous prime is 38969611. The next prime is 38969647. The reversal of 38969640 is 4696983.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (38969647) 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, 16962 + ... + 19121.

It is an arithmetic number, because the mean of its divisors is an integer number (2029725).

Almost surely, 2^38969640 is an apocalyptic number.

38969640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38969640 is an abundant number, since it is smaller than the sum of its proper divisors (90932760).

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

38969640 is a wasteful number, since it uses less digits than its factorization.

38969640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36103 (or 36093 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 38969640 is about 6242.5667797790. The cubic root of 38969640 is about 339.0331238681.

The spelling of 38969640 in words is "thirty-eight million, nine hundred sixty-nine thousand, six hundred forty".