780099628 has 24 divisors (see below), whose sum is σ = 1702036224. Its totient is φ = 303934800.

The previous prime is 780099589. The next prime is 780099643. The reversal of 780099628 is 826990087.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266088 + ... + 1266703.

It is an arithmetic number, because the mean of its divisors is an integer number (70918176).

Almost surely, 2^780099628 is an apocalyptic number.

It is an amenable number.

780099628 is an abundant number, since it is smaller than the sum of its proper divisors (921936596).

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

780099628 is a wasteful number, since it uses less digits than its factorization.

780099628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532813 (or 2532811 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 780099628 is about 27930.2636579034. The cubic root of 780099628 is about 920.5555985526. Note that the first 4 decimals are identical.

The spelling of 780099628 in words is "seven hundred eighty million, ninety-nine thousand, six hundred twenty-eight".