690623424 has 42 divisors (see below), whose sum is σ = 1979549000. Its totient is φ = 230207616.

The previous prime is 690623399. The next prime is 690623431. The reversal of 690623424 is 424326096.

690623424 is a `hidden beast` number, since 6 + 9 + 0 + 623 + 4 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 598924 + ... + 600075.

Almost surely, 2^690623424 is an apocalyptic number.

690623424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

690623424 is an abundant number, since it is smaller than the sum of its proper divisors (1288925576).

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

690623424 is a wasteful number, since it uses less digits than its factorization.

690623424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199017 (or 1199004 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 690623424 is about 26279.7150669485. The cubic root of 690623424 is about 883.9216435807.

The spelling of 690623424 in words is "six hundred ninety million, six hundred twenty-three thousand, four hundred twenty-four".