38257890 has 32 divisors (see below), whose sum is σ = 100166976. Its totient is φ = 9274560.

The previous prime is 38257841. The next prime is 38257907. The reversal of 38257890 is 9875283.

It is a super-2 number, since 2×38257890² = 2927332294504200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57637 + ... + 58296.

It is an arithmetic number, because the mean of its divisors is an integer number (3130218).

Almost surely, 2^38257890 is an apocalyptic number.

38257890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38257890 is an abundant number, since it is smaller than the sum of its proper divisors (61909086).

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

38257890 is a wasteful number, since it uses less digits than its factorization.

38257890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115954.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 38257890 is about 6185.2962742297. The cubic root of 38257890 is about 336.9563703581.

The spelling of 38257890 in words is "thirty-eight million, two hundred fifty-seven thousand, eight hundred ninety".