690740928 has 42 divisors (see below), whose sum is σ = 1979885804. Its totient is φ = 230246784.

The previous prime is 690740927. The next prime is 690740933. The reversal of 690740928 is 829047096.

It is a happy number.

690740928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690740928² = 954246059228602368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690740927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 599026 + ... + 600177.

Almost surely, 2^690740928 is an apocalyptic number.

It is an amenable number.

690740928 is an abundant number, since it is smaller than the sum of its proper divisors (1289144876).

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

690740928 is a wasteful number, since it uses less digits than its factorization.

690740928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199221 (or 1199208 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 690740928 is about 26281.9506125402. The cubic root of 690740928 is about 883.9717714483.

The spelling of 690740928 in words is "six hundred ninety million, seven hundred forty thousand, nine hundred twenty-eight".