1292467878 has 48 divisors (see below), whose sum is σ = 3065230896. Its totient is φ = 391158720.

The previous prime is 1292467871. The next prime is 1292467919. The reversal of 1292467878 is 8787642921.

It is a happy number.

1292467878 is a `hidden beast` number, since 12 + 92 + 467 + 87 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1292467871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31000 + ... + 59547.

It is an arithmetic number, because the mean of its divisors is an integer number (63858977).

Almost surely, 2^1292467878 is an apocalyptic number.

1292467878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1292467878 is an abundant number, since it is smaller than the sum of its proper divisors (1772763018).

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

1292467878 is a wasteful number, since it uses less digits than its factorization.

1292467878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90629 (or 90626 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1292467878 is about 35950.9092791824. The cubic root of 1292467878 is about 1089.2809774158.

The spelling of 1292467878 in words is "one billion, two hundred ninety-two million, four hundred sixty-seven thousand, eight hundred seventy-eight".