1402642878 has 96 divisors (see below), whose sum is σ = 3520486656. Its totient is φ = 364725504.

The previous prime is 1402642877. The next prime is 1402642889. The reversal of 1402642878 is 8782462041.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402642877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 516801 + ... + 519507.

It is an arithmetic number, because the mean of its divisors is an integer number (36671736).

Almost surely, 2^1402642878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402642878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760243328).

1402642878 is an abundant number, since it is smaller than the sum of its proper divisors (2117843778).

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

1402642878 is a wasteful number, since it uses less digits than its factorization.

1402642878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2805 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 1402642878 is about 37451.8741587120. The cubic root of 1402642878 is about 1119.3924420596.

The spelling of 1402642878 in words is "one billion, four hundred two million, six hundred forty-two thousand, eight hundred seventy-eight".