281742270436 has 81 divisors (see below), whose sum is σ = 567074337193. Its totient is φ = 122379864640.

The previous prime is 281742270347. The next prime is 281742270443. The reversal of 281742270436 is 634072247182.

The square root of 281742270436 is 530794.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 255524184036 + 26218086400 = 505494^2 + 161920^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 268581240 + ... + 268582288.

Almost surely, 2^281742270436 is an apocalyptic number.

281742270436 is the 530794-th square number.

It is an amenable number.

281742270436 is an abundant number, since it is smaller than the sum of its proper divisors (285332066757).

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

281742270436 is a wasteful number, since it uses less digits than its factorization.

281742270436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 281742270436 in words is "two hundred eighty-one billion, seven hundred forty-two million, two hundred seventy thousand, four hundred thirty-six".