79529940 has 216 divisors, whose sum is σ = 286820352. Its totient is φ = 17781120.

The previous prime is 79529939. The next prime is 79529981. The reversal of 79529940 is 4992597.

It is a super-2 number, since 2×79529940² = 12650022712807200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 626157 + ... + 626283.

It is an arithmetic number, because the mean of its divisors is an integer number (1327872).

Almost surely, 2^79529940 is an apocalyptic number.

79529940 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 79529940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143410176).

79529940 is an abundant number, since it is smaller than the sum of its proper divisors (207290412).

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

79529940 is a wasteful number, since it uses less digits than its factorization.

79529940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 79529940 is about 8917.9560438477. The cubic root of 79529940 is about 430.0413517110.

The spelling of 79529940 in words is "seventy-nine million, five hundred twenty-nine thousand, nine hundred forty".