838645031 has 16 divisors (see below), whose sum is σ = 974738688. Its totient is φ = 706708800.

The previous prime is 838645013. The next prime is 838645033. The reversal of 838645031 is 130546838.

It is a de Polignac number, because none of the positive numbers 2^k-838645031 is a prime.

It is a super-2 number, since 2×838645031² = 1406650976041981922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838645033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119171 + ... + 126011.

It is an arithmetic number, because the mean of its divisors is an integer number (60921168).

Almost surely, 2^838645031 is an apocalyptic number.

838645031 is a deficient number, since it is larger than the sum of its proper divisors (136093657).

838645031 is a wasteful number, since it uses less digits than its factorization.

838645031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 838645031 is about 28959.3686222611. The cubic root of 838645031 is about 943.0311953296.

The spelling of 838645031 in words is "eight hundred thirty-eight million, six hundred forty-five thousand, thirty-one".