38890404 has 144 divisors (see below), whose sum is σ = 119287168. Its totient is φ = 10450944.

The previous prime is 38890391. The next prime is 38890409. The reversal of 38890404 is 40409883.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (38890409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 400884 + ... + 400980.

Almost surely, 2^38890404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38890404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59643584).

38890404 is an abundant number, since it is smaller than the sum of its proper divisors (80396764).

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

38890404 is a wasteful number, since it uses less digits than its factorization.

38890404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 38890404 is about 6236.2171225832. The cubic root of 38890404 is about 338.8031854147.

Subtracting from 38890404 its product of nonzero digits (27648), we obtain a square (38862756 = 6234²).

The spelling of 38890404 in words is "thirty-eight million, eight hundred ninety thousand, four hundred four".