78073844 has 12 divisors (see below), whose sum is σ = 136724868. Its totient is φ = 39009600.

The previous prime is 78073837. The next prime is 78073859. The reversal of 78073844 is 44837087.

It can be written as a sum of positive squares in 2 ways, for example, as 54937744 + 23136100 = 7412^2 + 4810^2 .

It is a super-3 number, since 3×78073844³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464 + ... + 12504.

It is an arithmetic number, because the mean of its divisors is an integer number (11393739).

Almost surely, 2^78073844 is an apocalyptic number.

It is an amenable number.

78073844 is a deficient number, since it is larger than the sum of its proper divisors (58651024).

78073844 is a wasteful number, since it uses less digits than its factorization.

78073844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13666 (or 13664 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 78073844 is about 8835.9404706007. The cubic root of 78073844 is about 427.4006590645.

The spelling of 78073844 in words is "seventy-eight million, seventy-three thousand, eight hundred forty-four".