1997404704 has 48 divisors (see below), whose sum is σ = 5825766240. Its totient is φ = 665801280.

The previous prime is 1997404699. The next prime is 1997404723. The reversal of 1997404704 is 4074047991.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1997404704² = 7979251103122655232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1997404704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155042 + ... + 1156769.

It is an arithmetic number, because the mean of its divisors is an integer number (121370130).

Almost surely, 2^1997404704 is an apocalyptic number.

It is an amenable number.

1997404704 is an abundant number, since it is smaller than the sum of its proper divisors (3828361536).

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

1997404704 is a wasteful number, since it uses less digits than its factorization.

1997404704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311830 (or 2311816 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 1997404704 is about 44692.3338392615. Note that the first 3 decimals coincide. The cubic root of 1997404704 is about 1259.3758359847.

The spelling of 1997404704 in words is "one billion, nine hundred ninety-seven million, four hundred four thousand, seven hundred four".