402978143 has 4 divisors (see below), whose sum is σ = 403021080. Its totient is φ = 402935208.

The previous prime is 402978119. The next prime is 402978151. The reversal of 402978143 is 341879204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402978143 - 2¹⁰ = 402977119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402978097 and 402978106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402971143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680 + ... + 28397.

It is an arithmetic number, because the mean of its divisors is an integer number (100755270).

Almost surely, 2^402978143 is an apocalyptic number.

402978143 is a deficient number, since it is larger than the sum of its proper divisors (42937).

402978143 is a wasteful number, since it uses less digits than its factorization.

402978143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42936.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 402978143 is about 20074.3155051424. The cubic root of 402978143 is about 738.6303756611.

The spelling of 402978143 in words is "four hundred two million, nine hundred seventy-eight thousand, one hundred forty-three".