38978670 has 16 divisors (see below), whose sum is σ = 93548880. Its totient is φ = 10394304.

The previous prime is 38978623. The next prime is 38978677. The reversal of 38978670 is 7687983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38978677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649615 + ... + 649674.

It is an arithmetic number, because the mean of its divisors is an integer number (5846805).

Almost surely, 2^38978670 is an apocalyptic number.

38978670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38978670 is an abundant number, since it is smaller than the sum of its proper divisors (54570210).

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

38978670 is a wasteful number, since it uses less digits than its factorization.

38978670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299299.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 38978670 is about 6243.2899980699. The cubic root of 38978670 is about 339.0593086337.

The spelling of 38978670 in words is "thirty-eight million, nine hundred seventy-eight thousand, six hundred seventy".