869421240 has 96 divisors (see below), whose sum is σ = 2864412720. Its totient is φ = 228662784.

The previous prime is 869421239. The next prime is 869421251. The reversal of 869421240 is 42124968.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 869421195 and 869421204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9739 + ... + 42821.

Almost surely, 2^869421240 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 869421240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432206360).

869421240 is an abundant number, since it is smaller than the sum of its proper divisors (1994991480).

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

869421240 is a wasteful number, since it uses less digits than its factorization.

869421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33173 (or 33166 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 869421240 is about 29485.9498744741. The cubic root of 869421240 is about 954.4285352404.

The spelling of 869421240 in words is "eight hundred sixty-nine million, four hundred twenty-one thousand, two hundred forty".