281400402 has 16 divisors (see below), whose sum is σ = 571201632. Its totient is φ = 92400000.

The previous prime is 281400401. The next prime is 281400403. The reversal of 281400402 is 204004182.

It is an interprime number because it is at equal distance from previous prime (281400401) and next prime (281400403).

It is not an unprimeable number, because it can be changed into a prime (281400401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349599 + ... + 350402.

It is an arithmetic number, because the mean of its divisors is an integer number (35700102).

Almost surely, 2^281400402 is an apocalyptic number.

281400402 is an abundant number, since it is smaller than the sum of its proper divisors (289801230).

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

281400402 is a wasteful number, since it uses less digits than its factorization.

281400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700073.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 281400402 is about 16774.9933532029. The cubic root of 281400402 is about 655.3021172949.

Adding to 281400402 its reverse (204004182), we get a palindrome (485404584).

The spelling of 281400402 in words is "two hundred eighty-one million, four hundred thousand, four hundred two".