781630232 has 16 divisors (see below), whose sum is σ = 1501302600. Its totient is φ = 381282880.

The previous prime is 781630231. The next prime is 781630247. The reversal of 781630232 is 232036187.

It is a happy number.

It is a super-2 number, since 2×781630232² = 1221891639152747648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781630231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191182 + ... + 1191837.

Almost surely, 2^781630232 is an apocalyptic number.

It is an amenable number.

781630232 is a deficient number, since it is larger than the sum of its proper divisors (719672368).

781630232 is a wasteful number, since it uses less digits than its factorization.

781630232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383066 (or 2383062 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 781630232 is about 27957.6506881390. The cubic root of 781630232 is about 921.1572676706.

The spelling of 781630232 in words is "seven hundred eighty-one million, six hundred thirty thousand, two hundred thirty-two".