690407752 has 8 divisors (see below), whose sum is σ = 1294514550. Its totient is φ = 345203872.

The previous prime is 690407743. The next prime is 690407759. The reversal of 690407752 is 257704096.

It can be written as a sum of positive squares in only one way, i.e., 655052836 + 35354916 = 25594^2 + 5946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (690407759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43150477 + ... + 43150492.

Almost surely, 2^690407752 is an apocalyptic number.

It is an amenable number.

690407752 is a deficient number, since it is larger than the sum of its proper divisors (604106798).

690407752 is a wasteful number, since it uses less digits than its factorization.

690407752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86300975 (or 86300971 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 690407752 is about 26275.6113534966. The cubic root of 690407752 is about 883.8296218942.

The spelling of 690407752 in words is "six hundred ninety million, four hundred seven thousand, seven hundred fifty-two".