45147240 has 128 divisors (see below), whose sum is σ = 159408000. Its totient is φ = 11326464.

The previous prime is 45147233. The next prime is 45147241. The reversal of 45147240 is 4274154.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (45147241) 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 31 ways as a sum of consecutive naturals, for example, 17131 + ... + 19589.

It is an arithmetic number, because the mean of its divisors is an integer number (1245375).

Almost surely, 2^45147240 is an apocalyptic number.

45147240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45147240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79704000).

45147240 is an abundant number, since it is smaller than the sum of its proper divisors (114260760).

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

45147240 is a wasteful number, since it uses less digits than its factorization.

45147240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2486 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 45147240 is about 6719.1695915492. The cubic root of 45147240 is about 356.0768466013.

The spelling of 45147240 in words is "forty-five million, one hundred forty-seven thousand, two hundred forty".