391961434 has 16 divisors (see below), whose sum is σ = 592220160. Its totient is φ = 194560240.

The previous prime is 391961411. The next prime is 391961443. The reversal of 391961434 is 434169193.

It is a super-3 number, since 3×391961434³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182004 + ... + 184144.

It is an arithmetic number, because the mean of its divisors is an integer number (37013760).

Almost surely, 2^391961434 is an apocalyptic number.

391961434 is a deficient number, since it is larger than the sum of its proper divisors (200258726).

391961434 is a wasteful number, since it uses less digits than its factorization.

391961434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765.

The product of its digits is 69984, while the sum is 40.

The square root of 391961434 is about 19798.0159106917. The cubic root of 391961434 is about 731.8371404039.

The spelling of 391961434 in words is "three hundred ninety-one million, nine hundred sixty-one thousand, four hundred thirty-four".