378249940 has 12 divisors (see below), whose sum is σ = 794324916. Its totient is φ = 151299968.

The previous prime is 378249917. The next prime is 378249961. The reversal of 378249940 is 49942873.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 194267844 + 183982096 = 13938^2 + 13564^2 .

It is a super-2 number, since 2×378249940² = 286146034220007200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9456229 + ... + 9456268.

It is an arithmetic number, because the mean of its divisors is an integer number (66193743).

Almost surely, 2^378249940 is an apocalyptic number.

It is an amenable number.

378249940 is an abundant number, since it is smaller than the sum of its proper divisors (416074976).

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

378249940 is a wasteful number, since it uses less digits than its factorization.

378249940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18912506 (or 18912504 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 378249940 is about 19448.6487962532. The cubic root of 378249940 is about 723.2020068282.

The spelling of 378249940 in words is "three hundred seventy-eight million, two hundred forty-nine thousand, nine hundred forty".