78979950 has 72 divisors (see below), whose sum is σ = 242515728. Its totient is φ = 18051840.

The previous prime is 78979921. The next prime is 78979951. The reversal of 78979950 is 5997987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78979951) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9387 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (3368274).

Almost surely, 2^78979950 is an apocalyptic number.

78979950 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78979950 is an abundant number, since it is smaller than the sum of its proper divisors (163535778).

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

78979950 is a wasteful number, since it uses less digits than its factorization.

78979950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25098 (or 25090 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 54.

The square root of 78979950 is about 8887.0664451212. The cubic root of 78979950 is about 429.0477394833.

The spelling of 78979950 in words is "seventy-eight million, nine hundred seventy-nine thousand, nine hundred fifty".