72278274 has 8 divisors (see below), whose sum is σ = 144556560. Its totient is φ = 24092756.

The previous prime is 72278263. The next prime is 72278281. The reversal of 72278274 is 47287227.

It is a happy number.

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

72278274 is an admirable 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, 6023184 + ... + 6023195.

It is an arithmetic number, because the mean of its divisors is an integer number (18069570).

Almost surely, 2^72278274 is an apocalyptic number.

72278274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72278274 is a wasteful number, since it uses less digits than its factorization.

72278274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12046384.

The product of its digits is 87808, while the sum is 39.

The square root of 72278274 is about 8501.6630137874. The cubic root of 72278274 is about 416.5520323222.

The spelling of 72278274 in words is "seventy-two million, two hundred seventy-eight thousand, two hundred seventy-four".