72892045 has 4 divisors (see below), whose sum is σ = 87470460. Its totient is φ = 58313632.

The previous prime is 72892019. The next prime is 72892049. The reversal of 72892045 is 54029827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54029827 = 353 ⋅153059.

It can be written as a sum of positive squares in 2 ways, for example, as 52794756 + 20097289 = 7266^2 + 4483^2 .

It is a cyclic number.

It is not a de Polignac number, because 72892045 - 2²³ = 64503437 is a prime.

It is a super-3 number, since 3×72892045³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72891995 and 72892013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72892049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7289200 + ... + 7289209.

It is an arithmetic number, because the mean of its divisors is an integer number (21867615).

Almost surely, 2^72892045 is an apocalyptic number.

It is an amenable number.

72892045 is a deficient number, since it is larger than the sum of its proper divisors (14578415).

72892045 is a wasteful number, since it uses less digits than its factorization.

72892045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14578414.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 72892045 is about 8537.6838193974. The cubic root of 72892045 is about 417.7277994769.

The spelling of 72892045 in words is "seventy-two million, eight hundred ninety-two thousand, forty-five".