861154734 has 64 divisors (see below), whose sum is σ = 1937924352. Its totient is φ = 252844800.

The previous prime is 861154733. The next prime is 861154769. The reversal of 861154734 is 437451168.

It is a super-2 number, since 2×861154734² = 1483174951781221512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 861154692 and 861154701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861154733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423829 + ... + 425855.

It is an arithmetic number, because the mean of its divisors is an integer number (30280068).

Almost surely, 2^861154734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 861154734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968962176).

861154734 is an abundant number, since it is smaller than the sum of its proper divisors (1076769618).

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

861154734 is a wasteful number, since it uses less digits than its factorization.

861154734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its digits is 80640, while the sum is 39.

The square root of 861154734 is about 29345.4380440981. The cubic root of 861154734 is about 951.3939771929.

The spelling of 861154734 in words is "eight hundred sixty-one million, one hundred fifty-four thousand, seven hundred thirty-four".