72655274 has 4 divisors (see below), whose sum is σ = 108982914. Its totient is φ = 36327636.

The previous prime is 72655249. The next prime is 72655277. The reversal of 72655274 is 47255627.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72369049 + 286225 = 8507^2 + 535^2 .

It is not an unprimeable number, because it can be changed into a prime (72655277) 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 as a sum of consecutive naturals, namely, 18163817 + ... + 18163820.

Almost surely, 2^72655274 is an apocalyptic number.

72655274 is a deficient number, since it is larger than the sum of its proper divisors (36327640).

72655274 is a wasteful number, since it uses less digits than its factorization.

72655274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36327639.

The product of its digits is 117600, while the sum is 38.

The square root of 72655274 is about 8523.8063093902. The cubic root of 72655274 is about 417.2750152144.

The spelling of 72655274 in words is "seventy-two million, six hundred fifty-five thousand, two hundred seventy-four".