690573408 has 96 divisors (see below), whose sum is σ = 2083656960. Its totient is φ = 196170240.

The previous prime is 690573407. The next prime is 690573409. The reversal of 690573408 is 804375096.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (690573407) and next prime (690573409).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 690573408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690573407) 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, 117418 + ... + 123158.

It is an arithmetic number, because the mean of its divisors is an integer number (21704760).

Almost surely, 2^690573408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690573408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041828480).

690573408 is an abundant number, since it is smaller than the sum of its proper divisors (1393083552).

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

690573408 is a wasteful number, since it uses less digits than its factorization.

690573408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5940 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 690573408 is about 26278.7634412276. The cubic root of 690573408 is about 883.9003047484.

The spelling of 690573408 in words is "six hundred ninety million, five hundred seventy-three thousand, four hundred eight".