690869750 has 32 divisors (see below), whose sum is σ = 1296352512. Its totient is φ = 275697600.

The previous prime is 690869747. The next prime is 690869759. The reversal of 690869750 is 57968096.

It is a super-2 number, since 2×690869750² = 954602022930125000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690869759) 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, 111227 + ... + 117273.

It is an arithmetic number, because the mean of its divisors is an integer number (40511016).

Almost surely, 2^690869750 is an apocalyptic number.

690869750 is a deficient number, since it is larger than the sum of its proper divisors (605482762).

690869750 is a wasteful number, since it uses less digits than its factorization.

690869750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521 (or 6511 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 690869750 is about 26284.4012676720. The cubic root of 690869750 is about 884.0267211062.

The spelling of 690869750 in words is "six hundred ninety million, eight hundred sixty-nine thousand, seven hundred fifty".