253573278 has 64 divisors (see below), whose sum is σ = 613578240. Its totient is φ = 68245632.

The previous prime is 253573267. The next prime is 253573283. The reversal of 253573278 is 872375352.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156400 + ... + 158012.

It is an arithmetic number, because the mean of its divisors is an integer number (9587160).

Almost surely, 2^253573278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253573278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306789120).

253573278 is an abundant number, since it is smaller than the sum of its proper divisors (360004962).

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

253573278 is a wasteful number, since it uses less digits than its factorization.

253573278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841.

The product of its digits is 352800, while the sum is 42.

The square root of 253573278 is about 15923.9843632176. The cubic root of 253573278 is about 632.9477032532.

The spelling of 253573278 in words is "two hundred fifty-three million, five hundred seventy-three thousand, two hundred seventy-eight".