690459040 has 24 divisors (see below), whose sum is σ = 1631209860. Its totient is φ = 276183552.

The previous prime is 690459023. The next prime is 690459059. The reversal of 690459040 is 40954096.

It can be written as a sum of positive squares in 2 ways, for example, as 662959504 + 27499536 = 25748^2 + 5244^2 .

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, 2157525 + ... + 2157844.

Almost surely, 2^690459040 is an apocalyptic number.

It is an amenable number.

690459040 is an abundant number, since it is smaller than the sum of its proper divisors (940750820).

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

690459040 is a wasteful number, since it uses less digits than its factorization.

690459040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315384 (or 4315376 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 690459040 is about 26276.5872974403. The cubic root of 690459040 is about 883.8515068991.

The spelling of 690459040 in words is "six hundred ninety million, four hundred fifty-nine thousand, forty".