690989750 has 64 divisors (see below), whose sum is σ = 1431406080. Its totient is φ = 247660000.

The previous prime is 690989743. The next prime is 690989753. The reversal of 690989750 is 57989096.

It is a junction number, because it is equal to n+sod(n) for n = 690989692 and 690989701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690989753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193481 + ... + 197019.

It is an arithmetic number, because the mean of its divisors is an integer number (22365720).

Almost surely, 2^690989750 is an apocalyptic number.

690989750 is an abundant number, since it is smaller than the sum of its proper divisors (740416330).

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

690989750 is a wasteful number, since it uses less digits than its factorization.

690989750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 690989750 is about 26286.6838912785. The cubic root of 690989750 is about 884.0779015519.

The spelling of 690989750 in words is "six hundred ninety million, nine hundred eighty-nine thousand, seven hundred fifty".