78275372 has 36 divisors (see below), whose sum is σ = 161819280. Its totient is φ = 32453280.

The previous prime is 78275357. The next prime is 78275377. The reversal of 78275372 is 27357287.

It is a super-2 number, since 2×78275372² = 12254067723476768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78275377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25454 + ... + 28362.

It is an arithmetic number, because the mean of its divisors is an integer number (4494980).

Almost surely, 2^78275372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78275372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80909640).

78275372 is an abundant number, since it is smaller than the sum of its proper divisors (83543908).

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

78275372 is a wasteful number, since it uses less digits than its factorization.

78275372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2949 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 78275372 is about 8847.3370004765. The cubic root of 78275372 is about 427.7680855559.

The spelling of 78275372 in words is "seventy-eight million, two hundred seventy-five thousand, three hundred seventy-two".