690593490 has 24 divisors (see below), whose sum is σ = 1795543308. Its totient is φ = 184158240.

The previous prime is 690593489. The next prime is 690593507. The reversal of 690593490 is 94395096.

It is a happy number.

690593490 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 2 ways, for example, as 624350169 + 66243321 = 24987^2 + 8139^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3836541 + ... + 3836720.

Almost surely, 2^690593490 is an apocalyptic number.

690593490 is an abundant number, since it is smaller than the sum of its proper divisors (1104949818).

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

690593490 is a wasteful number, since it uses less digits than its factorization.

690593490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673274 (or 7673271 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 690593490 is about 26279.1455340542. The cubic root of 690593490 is about 883.9088726591.

The spelling of 690593490 in words is "six hundred ninety million, five hundred ninety-three thousand, four hundred ninety".