78378044 has 12 divisors (see below), whose sum is σ = 141586368. Its totient is φ = 37924800.

The previous prime is 78378031. The next prime is 78378049. The reversal of 78378044 is 44087387.

It is a super-2 number, since 2×78378044² = 12286235562531872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78377992 and 78378010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78378049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315917 + ... + 316164.

It is an arithmetic number, because the mean of its divisors is an integer number (11798864).

Almost surely, 2^78378044 is an apocalyptic number.

It is an amenable number.

78378044 is a deficient number, since it is larger than the sum of its proper divisors (63208324).

78378044 is a wasteful number, since it uses less digits than its factorization.

78378044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632116 (or 632114 counting only the distinct ones).

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

The square root of 78378044 is about 8853.1375229350. The cubic root of 78378044 is about 427.9550350177.

The spelling of 78378044 in words is "seventy-eight million, three hundred seventy-eight thousand, forty-four".