699321640 has 32 divisors (see below), whose sum is σ = 1574316000. Its totient is φ = 279578944.

The previous prime is 699321617. The next prime is 699321743. The reversal of 699321640 is 46123996.

699321640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 699321593 and 699321602.

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, 99771 + ... + 106549.

It is an arithmetic number, because the mean of its divisors is an integer number (49197375).

Almost surely, 2^699321640 is an apocalyptic number.

It is an amenable number.

699321640 is an abundant number, since it is smaller than the sum of its proper divisors (874994360).

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

699321640 is a wasteful number, since it uses less digits than its factorization.

699321640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9369 (or 9365 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 699321640 is about 26444.6902042735. The cubic root of 699321640 is about 887.6170906809.

The spelling of 699321640 in words is "six hundred ninety-nine million, three hundred twenty-one thousand, six hundred forty".