72090942 has 32 divisors (see below), whose sum is σ = 179760384. Its totient is φ = 18724800.

The previous prime is 72090923. The next prime is 72090943. The reversal of 72090942 is 24909027.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72090943) 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 15 ways as a sum of consecutive naturals, for example, 77559 + ... + 78482.

It is an arithmetic number, because the mean of its divisors is an integer number (5617512).

Almost surely, 2^72090942 is an apocalyptic number.

72090942 is an abundant number, since it is smaller than the sum of its proper divisors (107669442).

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

72090942 is a wasteful number, since it uses less digits than its factorization.

72090942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156064.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 72090942 is about 8490.6384918921. The cubic root of 72090942 is about 416.1918455310.

Adding to 72090942 its reverse (24909027), we get a palindrome (96999969).

The spelling of 72090942 in words is "seventy-two million, ninety thousand, nine hundred forty-two".