408137242 has 16 divisors (see below), whose sum is σ = 638931240. Its totient is φ = 195284992.

The previous prime is 408137203. The next prime is 408137243. The reversal of 408137242 is 242731804.

It can be written as a sum of positive squares in 4 ways, for example, as 206525641 + 201611601 = 14371^2 + 14199^2 .

It is not an unprimeable number, because it can be changed into a prime (408137243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24583 + ... + 37690.

Almost surely, 2^408137242 is an apocalyptic number.

408137242 is a deficient number, since it is larger than the sum of its proper divisors (230793998).

408137242 is a wasteful number, since it uses less digits than its factorization.

408137242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62417.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 408137242 is about 20202.4068368103. The cubic root of 408137242 is about 741.7691066739.

The spelling of 408137242 in words is "four hundred eight million, one hundred thirty-seven thousand, two hundred forty-two".