38720934 has 48 divisors (see below), whose sum is σ = 101526048. Its totient is φ = 10411776.

The previous prime is 38720897. The next prime is 38720939. The reversal of 38720934 is 43902783.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38720939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6897 + ... + 11180.

It is an arithmetic number, because the mean of its divisors is an integer number (2115126).

Almost surely, 2^38720934 is an apocalyptic number.

38720934 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

38720934 is an abundant number, since it is smaller than the sum of its proper divisors (62805114).

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

38720934 is a wasteful number, since it uses less digits than its factorization.

38720934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18109 (or 18106 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 38720934 is about 6222.6147237315. The cubic root of 38720934 is about 338.3103425104.

It can be divided in two parts, 387 and 20934, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 38720934 in words is "thirty-eight million, seven hundred twenty thousand, nine hundred thirty-four".