72278740 has 24 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 28872480.

The previous prime is 72278671. The next prime is 72278741. The reversal of 72278740 is 4787227.

It is a self number, because there is not a number n which added to its sum of digits gives 72278740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16237 + ... + 20203.

It is an arithmetic number, because the mean of its divisors is an integer number (6332928).

Almost surely, 2^72278740 is an apocalyptic number.

It is an amenable number.

72278740 is an abundant number, since it is smaller than the sum of its proper divisors (79711532).

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

72278740 is a wasteful number, since it uses less digits than its factorization.

72278740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887 (or 4885 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 72278740 is about 8501.6904201459. The cubic root of 72278740 is about 416.5529275328.

It can be divided in two parts, 72 and 278740, that multiplied together give a triangular number (20069280 = T₆₃₃₅).

The spelling of 72278740 in words is "seventy-two million, two hundred seventy-eight thousand, seven hundred forty".