78275040 has 96 divisors (see below), whose sum is σ = 247828896. Its totient is φ = 20766720.

The previous prime is 78275039. The next prime is 78275051. The reversal of 78275040 is 4057287.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×78275040² = 12253963774003200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78274992 and 78275010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149980 + ... + 150500.

It is an arithmetic number, because the mean of its divisors is an integer number (2581551).

Almost surely, 2^78275040 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 78275040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123914448).

78275040 is an abundant number, since it is smaller than the sum of its proper divisors (169553856).

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

78275040 is a wasteful number, since it uses less digits than its factorization.

78275040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 78275040 is about 8847.3182377487. The cubic root of 78275040 is about 427.7674807714.

The spelling of 78275040 in words is "seventy-eight million, two hundred seventy-five thousand, forty".