815961748 has 36 divisors (see below), whose sum is σ = 1690185952. Its totient is φ = 337629600.

The previous prime is 815961739. The next prime is 815961761. The reversal of 815961748 is 847169518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6223 + ... + 40873.

Almost surely, 2^815961748 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 815961748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845092976).

815961748 is an abundant number, since it is smaller than the sum of its proper divisors (874224204).

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

815961748 is a wasteful number, since it uses less digits than its factorization.

815961748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34720 (or 34689 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The square root of 815961748 is about 28565.0441624024. The cubic root of 815961748 is about 934.4511436522.

The spelling of 815961748 in words is "eight hundred fifteen million, nine hundred sixty-one thousand, seven hundred forty-eight".