78872850 has 180 divisors, whose sum is σ = 250594266. Its totient is φ = 17781120.

The previous prime is 78872839. The next prime is 78872861. The reversal of 78872850 is 5827887.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78872839) and next prime (78872861).

It can be written as a sum of positive squares in 3 ways, for example, as 60699681 + 18173169 = 7791^2 + 4263^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78872796 and 78872805.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 1080414 + ... + 1080486.

Almost surely, 2^78872850 is an apocalyptic number.

78872850 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78872850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125297133).

78872850 is an abundant number, since it is smaller than the sum of its proper divisors (171721416).

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

78872850 is a wasteful number, since it uses less digits than its factorization.

78872850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 78872850 is about 8881.0387905920. The cubic root of 78872850 is about 428.8537164051.

The spelling of 78872850 in words is "seventy-eight million, eight hundred seventy-two thousand, eight hundred fifty".