690452532 has 288 divisors, whose sum is σ = 2355696000. Its totient is φ = 172730880.

The previous prime is 690452531. The next prime is 690452537. The reversal of 690452532 is 235254096.

It is a super-2 number, since 2×690452532² = 953449397890422048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690452531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1687944 + ... + 1688352.

It is an arithmetic number, because the mean of its divisors is an integer number (8179500).

Almost surely, 2^690452532 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 690452532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177848000).

690452532 is an abundant number, since it is smaller than the sum of its proper divisors (1665243468).

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

690452532 is a wasteful number, since it uses less digits than its factorization.

690452532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 690452532 is about 26276.4634606714. The cubic root of 690452532 is about 883.8487299429.

The spelling of 690452532 in words is "six hundred ninety million, four hundred fifty-two thousand, five hundred thirty-two".