38899440 has 280 divisors, whose sum is σ = 146374560. Its totient is φ = 9580032.

The previous prime is 38899439. The next prime is 38899481. The reversal of 38899440 is 4499883.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1341346 + ... + 1341374.

Almost surely, 2^38899440 is an apocalyptic number.

38899440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38899440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73187280).

38899440 is an abundant number, since it is smaller than the sum of its proper divisors (107475120).

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

38899440 is a wasteful number, since it uses less digits than its factorization.

38899440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 38899440 is about 6236.9415581678. The cubic root of 38899440 is about 338.8294231512.

The spelling of 38899440 in words is "thirty-eight million, eight hundred ninety-nine thousand, four hundred forty".