253648738 has 32 divisors (see below), whose sum is σ = 480432384. Its totient is φ = 97861632.

The previous prime is 253648709. The next prime is 253648739. The reversal of 253648738 is 837846352.

It is a super-4 number, since 4×253648738⁴ (a number of 35 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (253648739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17695 + ... + 28642.

It is an arithmetic number, because the mean of its divisors is an integer number (15013512).

Almost surely, 2^253648738 is an apocalyptic number.

253648738 is a deficient number, since it is larger than the sum of its proper divisors (226783646).

253648738 is a wasteful number, since it uses less digits than its factorization.

253648738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46386.

The product of its digits is 967680, while the sum is 46.

The square root of 253648738 is about 15926.3535688493. The cubic root of 253648738 is about 633.0104826032.

The spelling of 253648738 in words is "two hundred fifty-three million, six hundred forty-eight thousand, seven hundred thirty-eight".