79749240 has 64 divisors (see below), whose sum is σ = 241522560. Its totient is φ = 21064320.

The previous prime is 79749239. The next prime is 79749247. The reversal of 79749240 is 4294797.

It is a junction number, because it is equal to n+sod(n) for n = 79749192 and 79749201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79749247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9735 + ... + 15945.

It is an arithmetic number, because the mean of its divisors is an integer number (3773790).

Almost surely, 2^79749240 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 79749240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120761280).

79749240 is an abundant number, since it is smaller than the sum of its proper divisors (161773320).

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

79749240 is a wasteful number, since it uses less digits than its factorization.

79749240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332 (or 6328 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 79749240 is about 8930.2429978137. The cubic root of 79749240 is about 430.4362617606.

The spelling of 79749240 in words is "seventy-nine million, seven hundred forty-nine thousand, two hundred forty".