3486400978 has 16 divisors (see below), whose sum is σ = 5365323360. Its totient is φ = 1698483136.

The previous prime is 3486400949. The next prime is 3486400979. The reversal of 3486400978 is 8790046843.

It is not an unprimeable number, because it can be changed into a prime (3486400979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117400 + ... + 144067.

It is an arithmetic number, because the mean of its divisors is an integer number (335332710).

Almost surely, 2^3486400978 is an apocalyptic number.

3486400978 is a deficient number, since it is larger than the sum of its proper divisors (1878922382).

3486400978 is a wasteful number, since it uses less digits than its factorization.

3486400978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261641.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 3486400978 is about 59045.7532596545. The cubic root of 3486400978 is about 1516.3255221986.

The spelling of 3486400978 in words is "three billion, four hundred eighty-six million, four hundred thousand, nine hundred seventy-eight".