38257040 has 20 divisors (see below), whose sum is σ = 88947804. Its totient is φ = 15302784.

The previous prime is 38256997. The next prime is 38257049. The reversal of 38257040 is 4075283.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 21381376 = 4108^2 + 4624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×38257040² = 2927202219123200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38256994 and 38257012.

It is not an unprimeable number, because it can be changed into a prime (38257049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239027 + ... + 239186.

Almost surely, 2^38257040 is an apocalyptic number.

It is an amenable number.

38257040 is an abundant number, since it is smaller than the sum of its proper divisors (50690764).

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

38257040 is a wasteful number, since it uses less digits than its factorization.

38257040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478226 (or 478220 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 38257040 is about 6185.2275625073. The cubic root of 38257040 is about 336.9538748813.

The spelling of 38257040 in words is "thirty-eight million, two hundred fifty-seven thousand, forty".