38781404 has 24 divisors (see below), whose sum is σ = 71221248. Its totient is φ = 18442160.

The previous prime is 38781377. The next prime is 38781443. The reversal of 38781404 is 40418783.

It is a happy number.

It is a super-2 number, since 2×38781404² = 3007994592422432, 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 7 ways as a sum of consecutive naturals, for example, 16469 + ... + 18675.

It is an arithmetic number, because the mean of its divisors is an integer number (2967552).

Almost surely, 2^38781404 is an apocalyptic number.

It is an amenable number.

38781404 is a deficient number, since it is larger than the sum of its proper divisors (32439844).

38781404 is a wasteful number, since it uses less digits than its factorization.

38781404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2423 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 38781404 is about 6227.4717181212. The cubic root of 38781404 is about 338.4863625944.

The spelling of 38781404 in words is "thirty-eight million, seven hundred eighty-one thousand, four hundred four".