78503944 has 8 divisors (see below), whose sum is σ = 147194910. Its totient is φ = 39251968.

The previous prime is 78503941. The next prime is 78503947. The reversal of 78503944 is 44930587.

It is an interprime number because it is at equal distance from previous prime (78503941) and next prime (78503947).

It can be written as a sum of positive squares in only one way, i.e., 54199044 + 24304900 = 7362^2 + 4930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 78503897 and 78503906.

It is not an unprimeable number, because it can be changed into a prime (78503941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906489 + ... + 4906504.

Almost surely, 2^78503944 is an apocalyptic number.

It is an amenable number.

78503944 is a deficient number, since it is larger than the sum of its proper divisors (68690966).

78503944 is a wasteful number, since it uses less digits than its factorization.

78503944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9812999 (or 9812995 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 78503944 is about 8860.2451433355. The cubic root of 78503944 is about 428.1840562787.

The spelling of 78503944 in words is "seventy-eight million, five hundred three thousand, nine hundred forty-four".