38860290 has 128 divisors (see below), whose sum is σ = 122688000. Its totient is φ = 8563968.

The previous prime is 38860279. The next prime is 38860307. The reversal of 38860290 is 9206883.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54456 + ... + 55164.

It is an arithmetic number, because the mean of its divisors is an integer number (958500).

Almost surely, 2^38860290 is an apocalyptic number.

38860290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38860290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61344000).

38860290 is an abundant number, since it is smaller than the sum of its proper divisors (83827710).

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

38860290 is a wasteful number, since it uses less digits than its factorization.

38860290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 38860290 is about 6233.8022105293. The cubic root of 38860290 is about 338.7157143624.

The spelling of 38860290 in words is "thirty-eight million, eight hundred sixty thousand, two hundred ninety".