78142744 has 32 divisors (see below), whose sum is σ = 163306800. Its totient is φ = 34836480.

The previous prime is 78142721. The next prime is 78142747. The reversal of 78142744 is 44724187.

It is a super-2 number, since 2×78142744² = 12212576879699072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78142747) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12537 + ... + 17704.

Almost surely, 2^78142744 is an apocalyptic number.

It is an amenable number.

78142744 is an abundant number, since it is smaller than the sum of its proper divisors (85164056).

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

78142744 is a wasteful number, since it uses less digits than its factorization.

78142744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30283 (or 30279 counting only the distinct ones).

The product of its digits is 50176, while the sum is 37.

The square root of 78142744 is about 8839.8384600625. The cubic root of 78142744 is about 427.5263488200.

The spelling of 78142744 in words is "seventy-eight million, one hundred forty-two thousand, seven hundred forty-four".