74209978 has 8 divisors (see below), whose sum is σ = 111781440. Its totient is φ = 36949500.

The previous prime is 74209973. The next prime is 74209987. The reversal of 74209978 is 87990247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (74209973) 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, 77148 + ... + 78103.

It is an arithmetic number, because the mean of its divisors is an integer number (13972680).

Almost surely, 2^74209978 is an apocalyptic number.

74209978 is a deficient number, since it is larger than the sum of its proper divisors (37571462).

74209978 is a wasteful number, since it uses less digits than its factorization.

74209978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155492.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 74209978 is about 8614.5213447991. The cubic root of 74209978 is about 420.2303687073.

The spelling of 74209978 in words is "seventy-four million, two hundred nine thousand, nine hundred seventy-eight".