45273920 has 28 divisors (see below), whose sum is σ = 107809284. Its totient is φ = 18109440.

The previous prime is 45273871. The next prime is 45273923. The reversal of 45273920 is 2937254.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23892544 + 21381376 = 4888^2 + 4624^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45273923) 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 in 3 ways as a sum of consecutive naturals, for example, 70421 + ... + 71060.

Almost surely, 2^45273920 is an apocalyptic number.

45273920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45273920 is an abundant number, since it is smaller than the sum of its proper divisors (62535364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45273920 is a wasteful number, since it uses less digits than its factorization.

45273920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141498 (or 141488 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 45273920 is about 6728.5897482311. The cubic root of 45273920 is about 356.4095778364.

The spelling of 45273920 in words is "forty-five million, two hundred seventy-three thousand, nine hundred twenty".