1978466315 has 16 divisors (see below), whose sum is σ = 2714511360. Its totient is φ = 1356069600.

The previous prime is 1978466291. The next prime is 1978466317. The reversal of 1978466315 is 5136648791.

It is not a de Polignac number, because 1978466315 - 2¹² = 1978462219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1978466317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78206 + ... + 100364.

It is an arithmetic number, because the mean of its divisors is an integer number (169656960).

Almost surely, 2^1978466315 is an apocalyptic number.

1978466315 is a deficient number, since it is larger than the sum of its proper divisors (736045045).

1978466315 is a wasteful number, since it uses less digits than its factorization.

1978466315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24722.

The product of its digits is 1088640, while the sum is 50.

The square root of 1978466315 is about 44479.9540804619. The cubic root of 1978466315 is about 1255.3829331497.

The spelling of 1978466315 in words is "one billion, nine hundred seventy-eight million, four hundred sixty-six thousand, three hundred fifteen".