72706542 has 16 divisors (see below), whose sum is σ = 151735680. Its totient is φ = 23181752.

The previous prime is 72706541. The next prime is 72706547. The reversal of 72706542 is 24560727.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72706541) 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, 263292 + ... + 263567.

It is an arithmetic number, because the mean of its divisors is an integer number (9483480).

Almost surely, 2^72706542 is an apocalyptic number.

72706542 is an abundant number, since it is smaller than the sum of its proper divisors (79029138).

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

72706542 is a wasteful number, since it uses less digits than its factorization.

72706542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526887.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 72706542 is about 8526.8131209732. The cubic root of 72706542 is about 417.3731398902.

The spelling of 72706542 in words is "seventy-two million, seven hundred six thousand, five hundred forty-two".