690478992 has 300 divisors, whose sum is σ = 2370692016. Its totient is φ = 193415040.

The previous prime is 690478973. The next prime is 690479011. The reversal of 690478992 is 299874096.

It is an interprime number because it is at equal distance from previous prime (690478973) and next prime (690479011).

It is a super-2 number, since 2×690478992² = 953522476786672128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5270767 + ... + 5270897.

Almost surely, 2^690478992 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 690478992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185346008).

690478992 is an abundant number, since it is smaller than the sum of its proper divisors (1680213024).

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

690478992 is a wasteful number, since it uses less digits than its factorization.

690478992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 690478992 is about 26276.9669482610. The cubic root of 690478992 is about 883.8600202863.

The spelling of 690478992 in words is "six hundred ninety million, four hundred seventy-eight thousand, nine hundred ninety-two".