1578798946 has 16 divisors (see below), whose sum is σ = 2416807800. Its totient is φ = 773359488.

The previous prime is 1578798941. The next prime is 1578798961. The reversal of 1578798946 is 6498978751.

It can be written as a sum of positive squares in 4 ways, for example, as 1506293721 + 72505225 = 38811^2 + 8515^2 .

It is a super-2 number, since 2×1578798946² = 4985212223781421832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1578798941) 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, 21285 + ... + 60088.

Almost surely, 2^1578798946 is an apocalyptic number.

1578798946 is a deficient number, since it is larger than the sum of its proper divisors (838008854).

1578798946 is a wasteful number, since it uses less digits than its factorization.

1578798946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81573.

The product of its digits is 30481920, while the sum is 64.

The square root of 1578798946 is about 39734.1030602177. The cubic root of 1578798946 is about 1164.4180865882.

The spelling of 1578798946 in words is "one billion, five hundred seventy-eight million, seven hundred ninety-eight thousand, nine hundred forty-six".