1978007404 has 12 divisors (see below), whose sum is σ = 3469329864. Its totient is φ = 986770304.

The previous prime is 1978007401. The next prime is 1978007431. The reversal of 1978007404 is 4047008791.

It is not an unprimeable number, because it can be changed into a prime (1978007401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556357 + ... + 559900.

It is an arithmetic number, because the mean of its divisors is an integer number (289110822).

Almost surely, 2^1978007404 is an apocalyptic number.

It is an amenable number.

1978007404 is a deficient number, since it is larger than the sum of its proper divisors (1491322460).

1978007404 is a wasteful number, since it uses less digits than its factorization.

1978007404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116704 (or 1116702 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1978007404 is about 44474.7951541095. The cubic root of 1978007404 is about 1255.2858624066.

The spelling of 1978007404 in words is "one billion, nine hundred seventy-eight million, seven thousand, four hundred four".