402078887 has 8 divisors (see below), whose sum is σ = 461527200. Its totient is φ = 343132704.

The previous prime is 402078839. The next prime is 402078967. The reversal of 402078887 is 788870204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402078887 - 2¹² = 402074791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402078487) 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, 123812 + ... + 127017.

It is an arithmetic number, because the mean of its divisors is an integer number (57690900).

Almost surely, 2^402078887 is an apocalyptic number.

402078887 is a deficient number, since it is larger than the sum of its proper divisors (59448313).

402078887 is a wasteful number, since it uses less digits than its factorization.

402078887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251065.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 402078887 is about 20051.9048222357. The cubic root of 402078887 is about 738.0805422974.

It can be divided in two parts, 40207 and 8887, that added together give a palindrome (49094).

The spelling of 402078887 in words is "four hundred two million, seventy-eight thousand, eight hundred eighty-seven".