690942730 has 32 divisors (see below), whose sum is σ = 1338463440. Its totient is φ = 255851520.

The previous prime is 690942727. The next prime is 690942739. The reversal of 690942730 is 37249096.

690942730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 117483921 + 573458809 = 10839^2 + 23947^2 .

It is a super-2 number, since 2×690942730² = 954803712279705800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690942739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22945 + ... + 43684.

Almost surely, 2^690942730 is an apocalyptic number.

690942730 is a deficient number, since it is larger than the sum of its proper divisors (647520710).

690942730 is a wasteful number, since it uses less digits than its factorization.

690942730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66714.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 690942730 is about 26285.7895068799. The cubic root of 690942730 is about 884.0578480534.

It can be divided in two parts, 69094 and 2730, that added together give a square (71824 = 268²).

The spelling of 690942730 in words is "six hundred ninety million, nine hundred forty-two thousand, seven hundred thirty".