690255380 has 24 divisors (see below), whose sum is σ = 1456828800. Its totient is φ = 274713120.

The previous prime is 690255353. The next prime is 690255413. The reversal of 690255380 is 83552096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82736 + ... + 90695.

It is an arithmetic number, because the mean of its divisors is an integer number (60701200).

Almost surely, 2^690255380 is an apocalyptic number.

It is an amenable number.

690255380 is an abundant number, since it is smaller than the sum of its proper divisors (766573420).

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

690255380 is a wasteful number, since it uses less digits than its factorization.

690255380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173639 (or 173637 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 690255380 is about 26272.7116986428. The cubic root of 690255380 is about 883.7645971340.

The spelling of 690255380 in words is "six hundred ninety million, two hundred fifty-five thousand, three hundred eighty".