253040402 has 8 divisors (see below), whose sum is σ = 379748736. Its totient is φ = 126457492.

The previous prime is 253040387. The next prime is 253040407. The reversal of 253040402 is 204040352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (253040407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26138 + ... + 34485.

It is an arithmetic number, because the mean of its divisors is an integer number (47468592).

Almost surely, 2^253040402 is an apocalyptic number.

253040402 is a deficient number, since it is larger than the sum of its proper divisors (126708334).

253040402 is a wasteful number, since it uses less digits than its factorization.

253040402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62712.

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

The square root of 253040402 is about 15907.2436958764. The cubic root of 253040402 is about 632.5040193051.

Adding to 253040402 its reverse (204040352), we get a palindrome (457080754).

Subtracting from 253040402 its reverse (204040352), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 253040402 in words is "two hundred fifty-three million, forty thousand, four hundred two".