40523402 has 4 divisors (see below), whose sum is σ = 60785106. Its totient is φ = 20261700.

The previous prime is 40523387. The next prime is 40523419. The reversal of 40523402 is 20432504.

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., 24690961 + 15832441 = 4969^2 + 3979^2 .

It is a super-2 number, since 2×40523402² = 3284292219307208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130849 + ... + 10130852.

Almost surely, 2^40523402 is an apocalyptic number.

40523402 is a deficient number, since it is larger than the sum of its proper divisors (20261704).

40523402 is a wasteful number, since it uses less digits than its factorization.

40523402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20261703.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40523402 is about 6365.7993999183. The cubic root of 40523402 is about 343.4804047281.

Adding to 40523402 its reverse (20432504), we get a palindrome (60955906).

The spelling of 40523402 in words is "forty million, five hundred twenty-three thousand, four hundred two".