72943470 has 128 divisors (see below), whose sum is σ = 209088000. Its totient is φ = 18040320.

The previous prime is 72943457. The next prime is 72943487. The reversal of 72943470 is 7434927.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 302550 + ... + 302790.

It is an arithmetic number, because the mean of its divisors is an integer number (1633500).

Almost surely, 2^72943470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72943470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104544000).

72943470 is an abundant number, since it is smaller than the sum of its proper divisors (136144530).

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

72943470 is a wasteful number, since it uses less digits than its factorization.

72943470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 72943470 is about 8540.6949365962. The cubic root of 72943470 is about 417.8260113935.

The spelling of 72943470 in words is "seventy-two million, nine hundred forty-three thousand, four hundred seventy".