690097572 has 72 divisors (see below), whose sum is σ = 1862864640. Its totient is φ = 214925760.

The previous prime is 690097517. The next prime is 690097591. The reversal of 690097572 is 275790096.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21703 + ... + 43025.

It is an arithmetic number, because the mean of its divisors is an integer number (25873120).

Almost surely, 2^690097572 is an apocalyptic number.

690097572 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690097572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931432320).

690097572 is an abundant number, since it is smaller than the sum of its proper divisors (1172767068).

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

690097572 is a wasteful number, since it uses less digits than its factorization.

690097572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21393 (or 21388 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 690097572 is about 26269.7082587531. The cubic root of 690097572 is about 883.6972424721.

The spelling of 690097572 in words is "six hundred ninety million, ninety-seven thousand, five hundred seventy-two".