38399140 has 24 divisors (see below), whose sum is σ = 86841720. Its totient is φ = 14178048.

The previous prime is 38399077. The next prime is 38399159. The reversal of 38399140 is 4199383.

It can be written as a sum of positive squares in 4 ways, for example, as 1893376 + 36505764 = 1376^2 + 6042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38399140.

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, 73585 + ... + 74104.

It is an arithmetic number, because the mean of its divisors is an integer number (3618405).

Almost surely, 2^38399140 is an apocalyptic number.

It is an amenable number.

38399140 is an abundant number, since it is smaller than the sum of its proper divisors (48442580).

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

38399140 is a wasteful number, since it uses less digits than its factorization.

38399140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147711 (or 147709 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 38399140 is about 6196.7039625917. The cubic root of 38399140 is about 337.3705475182.

The spelling of 38399140 in words is "thirty-eight million, three hundred ninety-nine thousand, one hundred forty".