690372390 has 32 divisors (see below), whose sum is σ = 1662312960. Its totient is φ = 183497184.

The previous prime is 690372383. The next prime is 690372407. The reversal of 690372390 is 93273096.

690372390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690372390² = 953228073748624200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28270 + ... + 46689.

It is an arithmetic number, because the mean of its divisors is an integer number (51947280).

Almost surely, 2^690372390 is an apocalyptic number.

690372390 is an abundant number, since it is smaller than the sum of its proper divisors (971940570).

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

690372390 is a wasteful number, since it uses less digits than its factorization.

690372390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75276.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 690372390 is about 26274.9384395092. The cubic root of 690372390 is about 883.8145320111.

The spelling of 690372390 in words is "six hundred ninety million, three hundred seventy-two thousand, three hundred ninety".