690593488 has 60 divisors (see below), whose sum is σ = 1461001728. Its totient is φ = 316068480.

The previous prime is 690593471. The next prime is 690593489. The reversal of 690593488 is 884395096.

It is a happy number.

It is a super-2 number, since 2×690593488² = 953838731336012288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690593489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342403 + ... + 344413.

Almost surely, 2^690593488 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 690593488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730500864).

690593488 is an abundant number, since it is smaller than the sum of its proper divisors (770408240).

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

690593488 is a wasteful number, since it uses less digits than its factorization.

690593488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172 (or 2153 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 690593488 is about 26279.1454960012. The cubic root of 690593488 is about 883.9088718058.

The spelling of 690593488 in words is "six hundred ninety million, five hundred ninety-three thousand, four hundred eighty-eight".