78874237 has 16 divisors (see below), whose sum is σ = 91188720. Its totient is φ = 67571712.

The previous prime is 78874231. The next prime is 78874249. The reversal of 78874237 is 73247887.

It can be written as a sum of positive squares in 8 ways, for example, as 622521 + 78251716 = 789^2 + 8846^2 .

It is not a de Polignac number, because 78874237 - 2⁷ = 78874109 is a prime.

It is a super-2 number, since 2×78874237² = 12442290524664338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78874231) 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, 13689 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (5699295).

Almost surely, 2^78874237 is an apocalyptic number.

It is an amenable number.

78874237 is a deficient number, since it is larger than the sum of its proper divisors (12314483).

78874237 is a wasteful number, since it uses less digits than its factorization.

78874237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992.

The product of its digits is 526848, while the sum is 46.

The square root of 78874237 is about 8881.1168779608. The cubic root of 78874237 is about 428.8562302259.

The spelling of 78874237 in words is "seventy-eight million, eight hundred seventy-four thousand, two hundred thirty-seven".