38155240 has 16 divisors (see below), whose sum is σ = 85849380. Its totient is φ = 15262080.

The previous prime is 38155223. The next prime is 38155253. The reversal of 38155240 is 4255183.

It can be written as a sum of positive squares in 2 ways, for example, as 37773316 + 381924 = 6146^2 + 618^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38155199 and 38155208.

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, 476901 + ... + 476980.

Almost surely, 2^38155240 is an apocalyptic number.

It is an amenable number.

38155240 is an abundant number, since it is smaller than the sum of its proper divisors (47694140).

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

38155240 is a wasteful number, since it uses less digits than its factorization.

38155240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953892 (or 953888 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 38155240 is about 6176.9927958514. The cubic root of 38155240 is about 336.6547371303.

The spelling of 38155240 in words is "thirty-eight million, one hundred fifty-five thousand, two hundred forty".