690432 has 72 divisors (see below), whose sum is σ = 1962240. Its totient is φ = 215040.

The previous prime is 690427. The next prime is 690433. The reversal of 690432 is 234096.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (690433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22257 + ... + 22287.

2⁶⁹⁰⁴³² is an apocalyptic number.

690432 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981120).

690432 is an abundant number, since it is smaller than the sum of its proper divisors (1271808).

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

690432 is a wasteful number, since it uses less digits than its factorization.

690432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 690432 is about 830.9223790463. The cubic root of 690432 is about 88.3839968847.

The spelling of 690432 in words is "six hundred ninety thousand, four hundred thirty-two".