72403542 has 12 divisors (see below), whose sum is σ = 156874380. Its totient is φ = 24134508.

The previous prime is 72403537. The next prime is 72403553. The reversal of 72403542 is 24530427.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2011192 + ... + 2011227.

It is an arithmetic number, because the mean of its divisors is an integer number (13072865).

Almost surely, 2^72403542 is an apocalyptic number.

72403542 is an abundant number, since it is smaller than the sum of its proper divisors (84470838).

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

72403542 is a wasteful number, since it uses less digits than its factorization.

72403542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022427 (or 4022424 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 72403542 is about 8509.0270889215. The cubic root of 72403542 is about 416.7925403879.

Adding to 72403542 its reverse (24530427), we get a palindrome (96933969).

The spelling of 72403542 in words is "seventy-two million, four hundred three thousand, five hundred forty-two".