72170514 has 48 divisors (see below), whose sum is σ = 174650112. Its totient is φ = 22204368.

The previous prime is 72170513. The next prime is 72170557. The reversal of 72170514 is 41507127.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72170513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 607 + ... + 12029.

It is an arithmetic number, because the mean of its divisors is an integer number (3638544).

Almost surely, 2^72170514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72170514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87325056).

72170514 is an abundant number, since it is smaller than the sum of its proper divisors (102479598).

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

72170514 is a wasteful number, since it uses less digits than its factorization.

72170514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453 (or 11441 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 72170514 is about 8495.3230662524. The cubic root of 72170514 is about 416.3449162658.

The spelling of 72170514 in words is "seventy-two million, one hundred seventy thousand, five hundred fourteen".