699231640 has 16 divisors (see below), whose sum is σ = 1573271280. Its totient is φ = 279692640.

The previous prime is 699231601. The next prime is 699231667. The reversal of 699231640 is 46132996.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 17480791 = 699231640 / (6 + 9 + 9 + 2 + 3 + 1 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 699231593 and 699231602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8740356 + ... + 8740435.

It is an arithmetic number, because the mean of its divisors is an integer number (98329455).

Almost surely, 2^699231640 is an apocalyptic number.

It is an amenable number.

699231640 is an abundant number, since it is smaller than the sum of its proper divisors (874039640).

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

699231640 is a wasteful number, since it uses less digits than its factorization.

699231640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17480802 (or 17480798 counting only the distinct ones).

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

The square root of 699231640 is about 26442.9884846626. The cubic root of 699231640 is about 887.5790114144.

The spelling of 699231640 in words is "six hundred ninety-nine million, two hundred thirty-one thousand, six hundred forty".