778370628 has 48 divisors (see below), whose sum is σ = 2131762304. Its totient is φ = 216380160.

The previous prime is 778370617. The next prime is 778370633. The reversal of 778370628 is 826073877.

It is a super-2 number, since 2×778370628² = 1211721669066228768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122113 + ... + 128328.

Almost surely, 2^778370628 is an apocalyptic number.

It is an amenable number.

778370628 is an abundant number, since it is smaller than the sum of its proper divisors (1353391676).

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

778370628 is a wasteful number, since it uses less digits than its factorization.

778370628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250492 (or 250490 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 778370628 is about 27899.2943996797. The cubic root of 778370628 is about 919.8749940425.

The spelling of 778370628 in words is "seven hundred seventy-eight million, three hundred seventy thousand, six hundred twenty-eight".