202423140 has 72 divisors (see below), whose sum is σ = 615396600. Its totient is φ = 53858304.

The previous prime is 202423099. The next prime is 202423153. The reversal of 202423140 is 41324202.

202423140 is a `hidden beast` number, since 202 + 423 + 1 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 111640356 + 90782784 = 10566^2 + 9528^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102886 + ... + 104834.

It is an arithmetic number, because the mean of its divisors is an integer number (8547175).

Almost surely, 2^202423140 is an apocalyptic number.

202423140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202423140 is an abundant number, since it is smaller than the sum of its proper divisors (412973460).

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

202423140 is a wasteful number, since it uses less digits than its factorization.

202423140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 202423140 is about 14227.5486293318. The cubic root of 202423140 is about 587.1558412855.

Adding to 202423140 its reverse (41324202), we get a palindrome (243747342).

The spelling of 202423140 in words is "two hundred two million, four hundred twenty-three thousand, one hundred forty".