79747040 has 48 divisors (see below), whose sum is σ = 188960688. Its totient is φ = 31804416.

The previous prime is 79747001. The next prime is 79747043. The reversal of 79747040 is 4074797.

It is a junction number, because it is equal to n+sod(n) for n = 79746985 and 79747003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79747043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83204 + ... + 84156.

It is an arithmetic number, because the mean of its divisors is an integer number (3936681).

Almost surely, 2^79747040 is an apocalyptic number.

It is an amenable number.

79747040 is an abundant number, since it is smaller than the sum of its proper divisors (109213648).

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

79747040 is a wasteful number, since it uses less digits than its factorization.

79747040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 79747040 is about 8930.1198200248. The cubic root of 79747040 is about 430.4323036519.

The spelling of 79747040 in words is "seventy-nine million, seven hundred forty-seven thousand, forty".