78726550 has 48 divisors (see below), whose sum is σ = 171274752. Its totient is φ = 26359200.

The previous prime is 78726547. The next prime is 78726559. The reversal of 78726550 is 5562787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78726559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12435 + ... + 17665.

It is an arithmetic number, because the mean of its divisors is an integer number (3568224).

Almost surely, 2^78726550 is an apocalyptic number.

78726550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78726550 is an abundant number, since it is smaller than the sum of its proper divisors (92548202).

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

78726550 is a wasteful number, since it uses less digits than its factorization.

78726550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 78726550 is about 8872.7983184562. The cubic root of 78726550 is about 428.5883943019.

The spelling of 78726550 in words is "seventy-eight million, seven hundred twenty-six thousand, five hundred fifty".