1630856872 has 32 divisors (see below), whose sum is σ = 3133896480. Its totient is φ = 795211200.

The previous prime is 1630856867. The next prime is 1630856873. The reversal of 1630856872 is 2786580361.

It is a super-3 number, since 3×1630856872³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1630856873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237763 + ... + 244525.

It is an arithmetic number, because the mean of its divisors is an integer number (97934265).

Almost surely, 2^1630856872 is an apocalyptic number.

It is an amenable number.

1630856872 is a deficient number, since it is larger than the sum of its proper divisors (1503039608).

1630856872 is a wasteful number, since it uses less digits than its factorization.

1630856872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513 (or 7509 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 1630856872 is about 40383.8689577906. The cubic root of 1630856872 is about 1177.0781083909.

The spelling of 1630856872 in words is "one billion, six hundred thirty million, eight hundred fifty-six thousand, eight hundred seventy-two".