45212240 has 40 divisors (see below), whose sum is σ = 105482088. Its totient is φ = 18022400.

The previous prime is 45212213. The next prime is 45212263. The reversal of 45212240 is 4221254.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16224784 + 28987456 = 4028^2 + 5384^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27440 + ... + 29040.

Almost surely, 2^45212240 is an apocalyptic number.

45212240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45212240 is an abundant number, since it is smaller than the sum of its proper divisors (60269848).

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

45212240 is a wasteful number, since it uses less digits than its factorization.

45212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 45212240 is about 6724.0047590703. The cubic root of 45212240 is about 356.2476499281.

Adding to 45212240 its reverse (4221254), we get a palindrome (49433494).

The spelling of 45212240 in words is "forty-five million, two hundred twelve thousand, two hundred forty".