79155140 has 48 divisors (see below), whose sum is σ = 177643200. Its totient is φ = 29538432.

The previous prime is 79155119. The next prime is 79155143. The reversal of 79155140 is 4155197.

It is a junction number, because it is equal to n+sod(n) for n = 79155097 and 79155106.

It is not an unprimeable number, because it can be changed into a prime (79155143) 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, 23906 + ... + 27014.

It is an arithmetic number, because the mean of its divisors is an integer number (3700900).

Almost surely, 2^79155140 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 79155140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88821600).

79155140 is an abundant number, since it is smaller than the sum of its proper divisors (98488060).

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

79155140 is a wasteful number, since it uses less digits than its factorization.

79155140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3202 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 79155140 is about 8896.9174436993. The cubic root of 79155140 is about 429.3647370927.

The spelling of 79155140 in words is "seventy-nine million, one hundred fifty-five thousand, one hundred forty".