691935048 has 160 divisors (see below), whose sum is σ = 2237938560. Its totient is φ = 195644160.

The previous prime is 691935011. The next prime is 691935053. The reversal of 691935048 is 840539196.

It is a happy number.

It is a super-2 number, since 2×691935048² = 957548221301524608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 691934994 and 691935012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 466468 + ... + 467948.

It is an arithmetic number, because the mean of its divisors is an integer number (13987116).

Almost surely, 2^691935048 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 691935048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118969280).

691935048 is an abundant number, since it is smaller than the sum of its proper divisors (1546003512).

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

691935048 is a wasteful number, since it uses less digits than its factorization.

691935048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 691935048 is about 26304.6582946823. The cubic root of 691935048 is about 884.4808676185.

The spelling of 691935048 in words is "six hundred ninety-one million, nine hundred thirty-five thousand, forty-eight".