690207140 has 108 divisors (see below), whose sum is σ = 1791827604. Its totient is φ = 222630912.

The previous prime is 690207137. The next prime is 690207149. The reversal of 690207140 is 41702096.

It can be written as a sum of positive squares in 6 ways, for example, as 155950144 + 534256996 = 12488^2 + 23114^2 .

It is a super-2 number, since 2×690207140² = 952771792213959200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690207149) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 282002 + ... + 284438.

Almost surely, 2^690207140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690207140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895913802).

690207140 is an abundant number, since it is smaller than the sum of its proper divisors (1101620464).

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

690207140 is a wasteful number, since it uses less digits than its factorization.

690207140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2468 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 690207140 is about 26271.7936197740. The cubic root of 690207140 is about 883.7440087167.

The spelling of 690207140 in words is "six hundred ninety million, two hundred seven thousand, one hundred forty".