78141544 has 48 divisors (see below), whose sum is σ = 164205900. Its totient is φ = 34804224.

The previous prime is 78141523. The next prime is 78141559. The reversal of 78141544 is 44514187.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19802500 + 58339044 = 4450^2 + 7638^2 .

It is a super-2 number, since 2×78141544² = 12212201797407872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38212 + ... + 40204.

Almost surely, 2^78141544 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 78141544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82102950).

78141544 is an abundant number, since it is smaller than the sum of its proper divisors (86064356).

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

78141544 is a wasteful number, since it uses less digits than its factorization.

78141544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054 (or 2037 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 78141544 is about 8839.7705852584. The cubic root of 78141544 is about 427.5241603709.

The spelling of 78141544 in words is "seventy-eight million, one hundred forty-one thousand, five hundred forty-four".