253630 has 16 divisors (see below), whose sum is σ = 491904. Its totient is φ = 93600.

The previous prime is 253613. The next prime is 253633. The reversal of 253630 is 36352.

253630 = T₁₉₁ + T₁₉₂ + ... + T₂₀₃.

It is a junction number, because it is equal to n+sod(n) for n = 253598 and 253607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253633) by changing a digit.

253630 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2²⁵³⁶³⁰ is an apocalyptic number.

253630 is a deficient number, since it is larger than the sum of its proper divisors (238274).

253630 is a wasteful number, since it uses less digits than its factorization.

253630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 253630 is about 503.6169179049. The cubic root of 253630 is about 63.2994894586.

Adding to 253630 its reverse (36352), we get a palindrome (289982).

It can be divided in two parts, 25 and 3630, that added together give a triangular number (3655 = T₈₅).

The spelling of 253630 in words is "two hundred fifty-three thousand, six hundred thirty".