38387690 has 32 divisors (see below), whose sum is σ = 78662016. Its totient is φ = 13351360.

The previous prime is 38387681. The next prime is 38387693. The reversal of 38387690 is 9678383.

It is a super-2 number, since 2×38387690² = 2947229487072200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (38387693) 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, 5057 + ... + 10116.

It is an arithmetic number, because the mean of its divisors is an integer number (2458188).

Almost surely, 2^38387690 is an apocalyptic number.

38387690 is an abundant number, since it is smaller than the sum of its proper divisors (40274326).

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

38387690 is a wasteful number, since it uses less digits than its factorization.

38387690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15214.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 38387690 is about 6195.7800154621. The cubic root of 38387690 is about 337.3370113784.

The spelling of 38387690 in words is "thirty-eight million, three hundred eighty-seven thousand, six hundred ninety".