690145320 has 64 divisors (see below), whose sum is σ = 2090574720. Its totient is φ = 182248704.

The previous prime is 690145319. The next prime is 690145327. The reversal of 690145320 is 23541096.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (690145327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15559 + ... + 40278.

It is an arithmetic number, because the mean of its divisors is an integer number (32665230).

Almost surely, 2^690145320 is an apocalyptic number.

690145320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

690145320 is an abundant number, since it is smaller than the sum of its proper divisors (1400429400).

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

690145320 is a wasteful number, since it uses less digits than its factorization.

690145320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55954 (or 55950 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 690145320 is about 26270.6170464266. The cubic root of 690145320 is about 883.7176230697.

The spelling of 690145320 in words is "six hundred ninety million, one hundred forty-five thousand, three hundred twenty".