709400440 has 96 divisors (see below), whose sum is σ = 1873763280. Its totient is φ = 240995328.

The previous prime is 709400423. The next prime is 709400453. The reversal of 709400440 is 44004907.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 709400399 and 709400408.

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, 219879 + ... + 223081.

Almost surely, 2^709400440 is an apocalyptic number.

709400440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709400440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936881640).

709400440 is an abundant number, since it is smaller than the sum of its proper divisors (1164362840).

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

709400440 is a wasteful number, since it uses less digits than its factorization.

709400440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 709400440 is about 26634.5722698901. The cubic root of 709400440 is about 891.8609548193.

The spelling of 709400440 in words is "seven hundred nine million, four hundred thousand, four hundred forty".