1398656388 has 96 divisors (see below), whose sum is σ = 3481612288. Its totient is φ = 436233600.

The previous prime is 1398656327. The next prime is 1398656393. The reversal of 1398656388 is 8836568931.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4225383 + ... + 4225713.

Almost surely, 2^1398656388 is an apocalyptic number.

It is an amenable number.

1398656388 is an abundant number, since it is smaller than the sum of its proper divisors (2082955900).

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

1398656388 is a wasteful number, since it uses less digits than its factorization.

1398656388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 711 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The square root of 1398656388 is about 37398.6147871816. The cubic root of 1398656388 is about 1118.3309504168.

The spelling of 1398656388 in words is "one billion, three hundred ninety-eight million, six hundred fifty-six thousand, three hundred eighty-eight".