1656408398 has 16 divisors (see below), whose sum is σ = 2524752720. Its totient is φ = 814879296.

The previous prime is 1656408367. The next prime is 1656408401. The reversal of 1656408398 is 8938046561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47636 + ... + 74712.

It is an arithmetic number, because the mean of its divisors is an integer number (157797045).

Almost surely, 2^1656408398 is an apocalyptic number.

1656408398 is a deficient number, since it is larger than the sum of its proper divisors (868344322).

1656408398 is a wasteful number, since it uses less digits than its factorization.

1656408398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27571.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 1656408398 is about 40698.9975060812. The cubic root of 1656408398 is about 1183.1935892285.

The spelling of 1656408398 in words is "one billion, six hundred fifty-six million, four hundred eight thousand, three hundred ninety-eight".