3491472978 has 64 divisors (see below), whose sum is σ = 9073489920. Its totient is φ = 974360016.

The previous prime is 3491472977. The next prime is 3491473033. The reversal of 3491472978 is 8792741943.

3491472978 is a `hidden beast` number, since 349 + 1 + 4 + 7 + 297 + 8 = 666.

It is a super-2 number, since 2×3491472978² = 24380767112208376968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3491472977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91150 + ... + 123657.

It is an arithmetic number, because the mean of its divisors is an integer number (141773280).

Almost surely, 2^3491472978 is an apocalyptic number.

3491472978 is an abundant number, since it is smaller than the sum of its proper divisors (5582016942).

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

3491472978 is a wasteful number, since it uses less digits than its factorization.

3491472978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214868 (or 214862 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 3491472978 is about 59088.6873944582. The cubic root of 3491472978 is about 1517.0604803587.

The spelling of 3491472978 in words is "three billion, four hundred ninety-one million, four hundred seventy-two thousand, nine hundred seventy-eight".