38253640 has 16 divisors (see below), whose sum is σ = 86070780. Its totient is φ = 15301440.

The previous prime is 38253637. The next prime is 38253641. The reversal of 38253640 is 4635283.

It can be written as a sum of positive squares in 2 ways, for example, as 37871716 + 381924 = 6154^2 + 618^2 .

It is not an unprimeable number, because it can be changed into a prime (38253641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478131 + ... + 478210.

Almost surely, 2^38253640 is an apocalyptic number.

It is an amenable number.

38253640 is an abundant number, since it is smaller than the sum of its proper divisors (47817140).

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

38253640 is a wasteful number, since it uses less digits than its factorization.

38253640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956352 (or 956348 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 38253640 is about 6184.9527079841. The cubic root of 38253640 is about 336.9438926042.

The spelling of 38253640 in words is "thirty-eight million, two hundred fifty-three thousand, six hundred forty".