1398023490 has 32 divisors (see below), whose sum is σ = 3501138816. Its totient is φ = 356597120.

The previous prime is 1398023449. The next prime is 1398023491. The reversal of 1398023490 is 943208931.

It is not an unprimeable number, because it can be changed into a prime (1398023491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012371 + ... + 1013750.

It is an arithmetic number, because the mean of its divisors is an integer number (109410588).

Almost surely, 2^1398023490 is an apocalyptic number.

1398023490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398023490 is an abundant number, since it is smaller than the sum of its proper divisors (2103115326).

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

1398023490 is a wasteful number, since it uses less digits than its factorization.

1398023490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026154.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1398023490 is about 37390.1523131426. The cubic root of 1398023490 is about 1118.1622417871.

The spelling of 1398023490 in words is "one billion, three hundred ninety-eight million, twenty-three thousand, four hundred ninety".