374399781 has 32 divisors (see below), whose sum is σ = 595937280. Its totient is φ = 204607296.

The previous prime is 374399777. The next prime is 374399783. The reversal of 374399781 is 187993473.

It is not a de Polignac number, because 374399781 - 2² = 374399777 is a prime.

It is a super-2 number, since 2×374399781² = 280350392025695922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (374399783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41760 + ... + 49926.

It is an arithmetic number, because the mean of its divisors is an integer number (18623040).

Almost surely, 2^374399781 is an apocalyptic number.

It is an amenable number.

374399781 is a deficient number, since it is larger than the sum of its proper divisors (221537499).

374399781 is a wasteful number, since it uses less digits than its factorization.

374399781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273.

The product of its digits is 1143072, while the sum is 51.

The square root of 374399781 is about 19349.4129368309. The cubic root of 374399781 is about 720.7398394369.

The spelling of 374399781 in words is "three hundred seventy-four million, three hundred ninety-nine thousand, seven hundred eighty-one".