38277990 has 48 divisors (see below), whose sum is σ = 100532016. Its totient is φ = 10104000.

The previous prime is 38277979. The next prime is 38277991. The reversal of 38277990 is 9977283.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38277991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6985 + ... + 11195.

It is an arithmetic number, because the mean of its divisors is an integer number (2094417).

Almost surely, 2^38277990 is an apocalyptic number.

38277990 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 38277990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50266008).

38277990 is an abundant number, since it is smaller than the sum of its proper divisors (62254026).

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

38277990 is a wasteful number, since it uses less digits than its factorization.

38277990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4325 (or 4322 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 38277990 is about 6186.9208819897. The cubic root of 38277990 is about 337.0153702775.

The spelling of 38277990 in words is "thirty-eight million, two hundred seventy-seven thousand, nine hundred ninety".