402887144 has 16 divisors (see below), whose sum is σ = 824087520. Its totient is φ = 183130480.

The previous prime is 402887143. The next prime is 402887183. The reversal of 402887144 is 441788204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402887098 and 402887107.

It is not an unprimeable number, because it can be changed into a prime (402887143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2289044 + ... + 2289219.

It is an arithmetic number, because the mean of its divisors is an integer number (51505470).

Almost surely, 2^402887144 is an apocalyptic number.

402887144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402887144 is an abundant number, since it is smaller than the sum of its proper divisors (421200376).

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

402887144 is a wasteful number, since it uses less digits than its factorization.

402887144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578280 (or 4578276 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 38.

The square root of 402887144 is about 20072.0488241734. The cubic root of 402887144 is about 738.5747732363.

The spelling of 402887144 in words is "four hundred two million, eight hundred eighty-seven thousand, one hundred forty-four".