72102340 has 24 divisors (see below), whose sum is σ = 159384960. Its totient is φ = 27322848.

The previous prime is 72102337. The next prime is 72102347. The reversal of 72102340 is 4320127.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (72102347) 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, 94492 + ... + 95251.

It is an arithmetic number, because the mean of its divisors is an integer number (6641040).

Almost surely, 2^72102340 is an apocalyptic number.

It is an amenable number.

72102340 is an abundant number, since it is smaller than the sum of its proper divisors (87282620).

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

72102340 is a wasteful number, since it uses less digits than its factorization.

72102340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189771 (or 189769 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72102340 is about 8491.3096751915. The cubic root of 72102340 is about 416.2137784977.

Adding to 72102340 its reverse (4320127), we get a palindrome (76422467).

The spelling of 72102340 in words is "seventy-two million, one hundred two thousand, three hundred forty".