690989752 has 72 divisors (see below), whose sum is σ = 1426702680. Its totient is φ = 313670400.

The previous prime is 690989743. The next prime is 690989753. The reversal of 690989752 is 257989096.

It is a junction number, because it is equal to n+sod(n) for n = 690989693 and 690989702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690989753) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2221677 + ... + 2221987.

It is an arithmetic number, because the mean of its divisors is an integer number (19815315).

Almost surely, 2^690989752 is an apocalyptic number.

690989752 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

690989752 is an abundant number, since it is smaller than the sum of its proper divisors (735712928).

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

690989752 is a wasteful number, since it uses less digits than its factorization.

690989752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 690989752 is about 26286.6839293206. The cubic root of 690989752 is about 884.0779024049.

The spelling of 690989752 in words is "six hundred ninety million, nine hundred eighty-nine thousand, seven hundred fifty-two".