72906454 has 4 divisors (see below), whose sum is σ = 109359684. Its totient is φ = 36453226.

The previous prime is 72906443. The next prime is 72906469. The reversal of 72906454 is 45460927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45460927 = 4799 ⋅9473.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18226612 + ... + 18226615.

It is an arithmetic number, because the mean of its divisors is an integer number (27339921).

Almost surely, 2^72906454 is an apocalyptic number.

72906454 is a deficient number, since it is larger than the sum of its proper divisors (36453230).

72906454 is a wasteful number, since it uses less digits than its factorization.

72906454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36453229.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 72906454 is about 8538.5276248309. The cubic root of 72906454 is about 417.7553225685.

The spelling of 72906454 in words is "seventy-two million, nine hundred six thousand, four hundred fifty-four".