1390989077604 has 81 divisors (see below), whose sum is σ = 4090315925241. Its totient is φ = 397411297920.

The previous prime is 1390989077591. The next prime is 1390989077651. The reversal of 1390989077604 is 4067709890931.

The square root of 1390989077604 is 1179402.

It is a perfect power (a square), and thus also a powerful number.

1390989077604 is a `hidden beast` number, since 1 + 390 + 98 + 90 + 7 + 76 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 344214543204 + 1046774534400 = 586698^2 + 1023120^2 .

It is a super-2 number, since 2×1390989077604² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 49520844 + ... + 49548924.

Almost surely, 2^{1390989077604} is an apocalyptic number.

1390989077604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1390989077604 is the 1179402-nd square number.

It is an amenable number.

1390989077604 is an abundant number, since it is smaller than the sum of its proper divisors (2699326847637).

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

1390989077604 is an frugal number, since it uses more digits than its factorization.

1390989077604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56186 (or 28093 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 1390989077604 in words is "one trillion, three hundred ninety billion, nine hundred eighty-nine million, seventy-seven thousand, six hundred four".