79945740 has 144 divisors (see below), whose sum is σ = 281578752. Its totient is φ = 17981568.

The previous prime is 79945727. The next prime is 79945741. The reversal of 79945740 is 4754997.

79945740 is a `hidden beast` number, since 79 + 9 + 4 + 574 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79945741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83947 + ... + 84893.

It is an arithmetic number, because the mean of its divisors is an integer number (1955408).

Almost surely, 2^79945740 is an apocalyptic number.

79945740 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 79945740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140789376).

79945740 is an abundant number, since it is smaller than the sum of its proper divisors (201633012).

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

79945740 is a wasteful number, since it uses less digits than its factorization.

79945740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 79945740 is about 8941.2381692918. The cubic root of 79945740 is about 430.7894996186.

The spelling of 79945740 in words is "seventy-nine million, nine hundred forty-five thousand, seven hundred forty".