45272989 has 16 divisors (see below), whose sum is σ = 49821696. Its totient is φ = 40953600.

The previous prime is 45272959. The next prime is 45272999. The reversal of 45272989 is 98927254.

It is a cyclic number.

It is not a de Polignac number, because 45272989 - 2⁷ = 45272861 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45272939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142659 + ... + 142975.

It is an arithmetic number, because the mean of its divisors is an integer number (3113856).

Almost surely, 2^45272989 is an apocalyptic number.

It is an amenable number.

45272989 is a deficient number, since it is larger than the sum of its proper divisors (4548707).

45272989 is a wasteful number, since it uses less digits than its factorization.

45272989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 362880, while the sum is 46.

The square root of 45272989 is about 6728.5205654735. The cubic root of 45272989 is about 356.4071347846.

It can be divided in two parts, 452 and 72989, that added together give a square (73441 = 271²).

The spelling of 45272989 in words is "forty-five million, two hundred seventy-two thousand, nine hundred eighty-nine".