1390814898 has 48 divisors (see below), whose sum is σ = 3094465248. Its totient is φ = 416363200.

The previous prime is 1390814881. The next prime is 1390814903. The reversal of 1390814898 is 8984180931.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390814898.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48718 + ... + 71798.

It is an arithmetic number, because the mean of its divisors is an integer number (64468026).

Almost surely, 2^1390814898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390814898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547232624).

1390814898 is an abundant number, since it is smaller than the sum of its proper divisors (1703650350).

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

1390814898 is a wasteful number, since it uses less digits than its factorization.

1390814898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23191 (or 23180 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 1390814898 is about 37293.6307966923. The cubic root of 1390814898 is about 1116.2370788444.

The spelling of 1390814898 in words is "one billion, three hundred ninety million, eight hundred fourteen thousand, eight hundred ninety-eight".