38173890 has 32 divisors (see below), whose sum is σ = 92877696. Its totient is φ = 10039680.

The previous prime is 38173879. The next prime is 38173897. The reversal of 38173890 is 9837183.

It is not an unprimeable number, because it can be changed into a prime (38173897) 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, 6526 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (2902428).

Almost surely, 2^38173890 is an apocalyptic number.

38173890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38173890 is an abundant number, since it is smaller than the sum of its proper divisors (54703806).

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

38173890 is a wasteful number, since it uses less digits than its factorization.

38173890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17514.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 38173890 is about 6178.5022456903. The cubic root of 38173890 is about 336.7095796468.

The spelling of 38173890 in words is "thirty-eight million, one hundred seventy-three thousand, eight hundred ninety".