391474380 has 48 divisors (see below), whose sum is σ = 1195778304. Its totient is φ = 94902720.

The previous prime is 391474379. The next prime is 391474403. The reversal of 391474380 is 83474193.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295912 + ... + 297231.

It is an arithmetic number, because the mean of its divisors is an integer number (24912048).

Almost surely, 2^391474380 is an apocalyptic number.

391474380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

391474380 is an abundant number, since it is smaller than the sum of its proper divisors (804303924).

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

391474380 is a wasteful number, since it uses less digits than its factorization.

391474380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593166 (or 593164 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 391474380 is about 19785.7115110880. The cubic root of 391474380 is about 731.5338861228.

The spelling of 391474380 in words is "three hundred ninety-one million, four hundred seventy-four thousand, three hundred eighty".