74078440 has 32 divisors (see below), whose sum is σ = 171184680. Its totient is φ = 28829952.

The previous prime is 74078419. The next prime is 74078443. The reversal of 74078440 is 4487047.

It can be written as a sum of positive squares in 4 ways, for example, as 73650724 + 427716 = 8582^2 + 654^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 74078396 and 74078405.

It is not an unprimeable number, because it can be changed into a prime (74078443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23547 + ... + 26506.

Almost surely, 2^74078440 is an apocalyptic number.

It is an amenable number.

74078440 is an abundant number, since it is smaller than the sum of its proper divisors (97106240).

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

74078440 is a wasteful number, since it uses less digits than its factorization.

74078440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50101 (or 50097 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 74078440 is about 8606.8832918775. The cubic root of 74078440 is about 419.9819342192.

The spelling of 74078440 in words is "seventy-four million, seventy-eight thousand, four hundred forty".