40290722 has 4 divisors (see below), whose sum is σ = 60436086. Its totient is φ = 20145360.

The previous prime is 40290721. The next prime is 40290727. The reversal of 40290722 is 22709204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34234201 + 6056521 = 5851^2 + 2461^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40290691 and 40290700.

It is not an unprimeable number, because it can be changed into a prime (40290721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072679 + ... + 10072682.

Almost surely, 2^40290722 is an apocalyptic number.

40290722 is a deficient number, since it is larger than the sum of its proper divisors (20145364).

40290722 is a wasteful number, since it uses less digits than its factorization.

40290722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20145363.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40290722 is about 6347.4973020869. The cubic root of 40290722 is about 342.8217361420.

Adding to 40290722 its reverse (22709204), we get a palindrome (62999926).

The spelling of 40290722 in words is "forty million, two hundred ninety thousand, seven hundred twenty-two".