1642292878 has 16 divisors (see below), whose sum is σ = 2567787984. Its totient is φ = 787026240.

The previous prime is 1642292867. The next prime is 1642292879. The reversal of 1642292878 is 8782922461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642292879) 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, 160663 + ... + 170578.

It is an arithmetic number, because the mean of its divisors is an integer number (160486749).

Almost surely, 2^1642292878 is an apocalyptic number.

1642292878 is a deficient number, since it is larger than the sum of its proper divisors (925495106).

1642292878 is a wasteful number, since it uses less digits than its factorization.

1642292878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331347.

The product of its digits is 774144, while the sum is 49.

The square root of 1642292878 is about 40525.2128680406. The cubic root of 1642292878 is about 1179.8230314901.

The spelling of 1642292878 in words is "one billion, six hundred forty-two million, two hundred ninety-two thousand, eight hundred seventy-eight".