408079988 has 6 divisors (see below), whose sum is σ = 714139986. Its totient is φ = 204039992.

The previous prime is 408079979. The next prime is 408079999. The reversal of 408079988 is 889970804.

It can be written as a sum of positive squares in only one way, i.e., 244547044 + 163532944 = 15638^2 + 12788^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51009995 + ... + 51010002.

It is an arithmetic number, because the mean of its divisors is an integer number (119023331).

Almost surely, 2^408079988 is an apocalyptic number.

It is an amenable number.

408079988 is a deficient number, since it is larger than the sum of its proper divisors (306059998).

408079988 is a wasteful number, since it uses less digits than its factorization.

408079988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102020001 (or 102019999 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 408079988 is about 20200.9897777312. The cubic root of 408079988 is about 741.7344196209.

The spelling of 408079988 in words is "four hundred eight million, seventy-nine thousand, nine hundred eighty-eight".