1398862090 has 16 divisors (see below), whose sum is σ = 2522251872. Its totient is φ = 558589264.

The previous prime is 1398862063. The next prime is 1398862097. The reversal of 1398862090 is 902688931.

It is a self number, because there is not a number n which added to its sum of digits gives 1398862090.

It is not an unprimeable number, because it can be changed into a prime (1398862097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113284 + ... + 125023.

It is an arithmetic number, because the mean of its divisors is an integer number (157640742).

Almost surely, 2^1398862090 is an apocalyptic number.

1398862090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398862090 is a deficient number, since it is larger than the sum of its proper divisors (1123389782).

1398862090 is a wasteful number, since it uses less digits than its factorization.

1398862090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238901.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1398862090 is about 37401.3648146695. The cubic root of 1398862090 is about 1118.3857724680.

The spelling of 1398862090 in words is "one billion, three hundred ninety-eight million, eight hundred sixty-two thousand, ninety".