40742740 has 24 divisors (see below), whose sum is σ = 85889160. Its totient is φ = 16234368.

The previous prime is 40742717. The next prime is 40742753. The reversal of 40742740 is 4724704.

It can be written as a sum of positive squares in 4 ways, for example, as 7033104 + 33709636 = 2652^2 + 5806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40742699 and 40742708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594 + ... + 9166.

It is an arithmetic number, because the mean of its divisors is an integer number (3578715).

Almost surely, 2^40742740 is an apocalyptic number.

It is an amenable number.

40742740 is an abundant number, since it is smaller than the sum of its proper divisors (45146420).

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

40742740 is a wasteful number, since it uses less digits than its factorization.

40742740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851 (or 7849 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 40742740 is about 6383.0039949854. The cubic root of 40742740 is about 344.0990002601.

The spelling of 40742740 in words is "forty million, seven hundred forty-two thousand, seven hundred forty".