72261423 has 32 divisors (see below), whose sum is σ = 120314880. Its totient is φ = 42530400.

The previous prime is 72261367. The next prime is 72261433. The reversal of 72261423 is 32416227.

72261423 is a `hidden beast` number, since 7 + 22 + 614 + 23 = 666.

It is not a de Polignac number, because 72261423 - 2¹³ = 72253231 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72261433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3598 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (3759840).

Almost surely, 2^72261423 is an apocalyptic number.

72261423 is a deficient number, since it is larger than the sum of its proper divisors (48053457).

72261423 is a wasteful number, since it uses less digits than its factorization.

72261423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8996 (or 8990 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 72261423 is about 8500.6719146195. The cubic root of 72261423 is about 416.5196580762.

It can be divided in two parts, 7226 and 1423, that added together give a square (8649 = 93²).

The spelling of 72261423 in words is "seventy-two million, two hundred sixty-one thousand, four hundred twenty-three".