402048381 has 12 divisors (see below), whose sum is σ = 623585472. Its totient is φ = 229741848.

The previous prime is 402048343. The next prime is 402048389. The reversal of 402048381 is 183840204.

It is not a de Polignac number, because 402048381 - 2¹⁷ = 401917309 is a prime.

It is a super-2 number, since 2×402048381² = 323285801329442322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402048389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1367365 + ... + 1367658.

It is an arithmetic number, because the mean of its divisors is an integer number (51965456).

Almost surely, 2^402048381 is an apocalyptic number.

It is an amenable number.

402048381 is a deficient number, since it is larger than the sum of its proper divisors (221537091).

402048381 is a wasteful number, since it uses less digits than its factorization.

402048381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735040 (or 2735033 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 402048381 is about 20051.1441319442. The cubic root of 402048381 is about 738.0618756002.

Adding to 402048381 its reverse (183840204), we get a palindrome (585888585).

The spelling of 402048381 in words is "four hundred two million, forty-eight thousand, three hundred eighty-one".