79253720 has 64 divisors (see below), whose sum is σ = 219481920. Its totient is φ = 25081344.

The previous prime is 79253719. The next prime is 79253729. The reversal of 79253720 is 2735297.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79253729) 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, 7247 + ... + 14526.

It is an arithmetic number, because the mean of its divisors is an integer number (3429405).

Almost surely, 2^79253720 is an apocalyptic number.

79253720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79253720 is an abundant number, since it is smaller than the sum of its proper divisors (140228200).

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

79253720 is a wasteful number, since it uses less digits than its factorization.

79253720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21804 (or 21800 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 79253720 is about 8902.4558409464. The cubic root of 79253720 is about 429.5429071043.

The spelling of 79253720 in words is "seventy-nine million, two hundred fifty-three thousand, seven hundred twenty".