861560454 has 32 divisors (see below), whose sum is σ = 1750301280. Its totient is φ = 282673152.

The previous prime is 861560443. The next prime is 861560471. The reversal of 861560454 is 454065168.

It is a happy number.

It is a super-2 number, since 2×861560454² = 1484572831793372232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247494 + ... + 250950.

It is an arithmetic number, because the mean of its divisors is an integer number (54696915).

Almost surely, 2^861560454 is an apocalyptic number.

861560454 is an abundant number, since it is smaller than the sum of its proper divisors (888740826).

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

861560454 is a wasteful number, since it uses less digits than its factorization.

861560454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 861560454 is about 29352.3500592372. The cubic root of 861560454 is about 951.5433653519.

The spelling of 861560454 in words is "eight hundred sixty-one million, five hundred sixty thousand, four hundred fifty-four".