511139994 has 32 divisors (see below), whose sum is σ = 1078738560. Its totient is φ = 161137152.

The previous prime is 511139977. The next prime is 511139999. The reversal of 511139994 is 499931115.

It is a super-2 number, since 2×511139994² = 522528186932640072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511139999) 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, 8527 + ... + 33090.

It is an arithmetic number, because the mean of its divisors is an integer number (33710580).

Almost surely, 2^511139994 is an apocalyptic number.

511139994 is an abundant number, since it is smaller than the sum of its proper divisors (567598566).

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

511139994 is a wasteful number, since it uses less digits than its factorization.

511139994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41734.

The product of its digits is 43740, while the sum is 42.

The square root of 511139994 is about 22608.4053838390. The cubic root of 511139994 is about 799.5518291839.

The spelling of 511139994 in words is "five hundred eleven million, one hundred thirty-nine thousand, nine hundred ninety-four".