72740170 has 16 divisors (see below), whose sum is σ = 137823840. Its totient is φ = 27564624.

The previous prime is 72740159. The next prime is 72740179. The reversal of 72740170 is 7104727.

It is a super-2 number, since 2×72740170² = 10582264663257800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72740179) 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, 191232 + ... + 191611.

It is an arithmetic number, because the mean of its divisors is an integer number (8613990).

Almost surely, 2^72740170 is an apocalyptic number.

72740170 is a deficient number, since it is larger than the sum of its proper divisors (65083670).

72740170 is a wasteful number, since it uses less digits than its factorization.

72740170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382869.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 72740170 is about 8528.7847903438. The cubic root of 72740170 is about 417.4374773406.

Adding to 72740170 its reverse (7104727), we get a palindrome (79844897).

The spelling of 72740170 in words is "seventy-two million, seven hundred forty thousand, one hundred seventy".