45729140 has 12 divisors (see below), whose sum is σ = 96031236. Its totient is φ = 18291648.

The previous prime is 45729139. The next prime is 45729149. The reversal of 45729140 is 4192754.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13147876 + 32581264 = 3626^2 + 5708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 45729097 and 45729106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45729149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143209 + ... + 1143248.

It is an arithmetic number, because the mean of its divisors is an integer number (8002603).

Almost surely, 2^45729140 is an apocalyptic number.

It is an amenable number.

45729140 is an abundant number, since it is smaller than the sum of its proper divisors (50302096).

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

45729140 is a wasteful number, since it uses less digits than its factorization.

45729140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286466 (or 2286464 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 45729140 is about 6762.3324378501. The cubic root of 45729140 is about 357.6001382153.

The spelling of 45729140 in words is "forty-five million, seven hundred twenty-nine thousand, one hundred forty".