378633731 has 24 divisors (see below), whose sum is σ = 447885936. Its totient is φ = 319119360.

The previous prime is 378633727. The next prime is 378633737. The reversal of 378633731 is 137336873.

It is not a de Polignac number, because 378633731 - 2² = 378633727 is a prime.

It is a super-2 number, since 2×378633731² = 286727004501960722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378633737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1347311 + ... + 1347591.

It is an arithmetic number, because the mean of its divisors is an integer number (18661914).

Almost surely, 2^378633731 is an apocalyptic number.

378633731 is a deficient number, since it is larger than the sum of its proper divisors (69252205).

378633731 is a wasteful number, since it uses less digits than its factorization.

378633731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 652 counting only the distinct ones).

The product of its digits is 190512, while the sum is 41.

The square root of 378633731 is about 19458.5130726888. The cubic root of 378633731 is about 723.4465229273.

The spelling of 378633731 in words is "three hundred seventy-eight million, six hundred thirty-three thousand, seven hundred thirty-one".