1398117590 has 16 divisors (see below), whose sum is σ = 2521746000. Its totient is φ = 558106080.

The previous prime is 1398117559. The next prime is 1398117599. The reversal of 1398117590 is 957118931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398117599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137465 + ... + 147284.

It is an arithmetic number, because the mean of its divisors is an integer number (157609125).

Almost surely, 2^1398117590 is an apocalyptic number.

1398117590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398117590 is a deficient number, since it is larger than the sum of its proper divisors (1123628410).

1398117590 is a wasteful number, since it uses less digits than its factorization.

1398117590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285247.

The product of its (nonzero) digits is 68040, while the sum is 44.

The square root of 1398117590 is about 37391.4106446922. The cubic root of 1398117590 is about 1118.1873288015.

The spelling of 1398117590 in words is "one billion, three hundred ninety-eight million, one hundred seventeen thousand, five hundred ninety".