38394240 has 64 divisors (see below), whose sum is σ = 122387760. Its totient is φ = 10237952.

The previous prime is 38394127. The next prime is 38394299. The reversal of 38394240 is 4249383.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8079 + ... + 11918.

Almost surely, 2^38394240 is an apocalyptic number.

38394240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38394240 is an abundant number, since it is smaller than the sum of its proper divisors (83993520).

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

38394240 is a wasteful number, since it uses less digits than its factorization.

38394240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20019 (or 20007 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 38394240 is about 6196.3085785006. The cubic root of 38394240 is about 337.3561966239.

The spelling of 38394240 in words is "thirty-eight million, three hundred ninety-four thousand, two hundred forty".