1260878690 has 16 divisors (see below), whose sum is σ = 2284614720. Its totient is φ = 501010800.

The previous prime is 1260878687. The next prime is 1260878693. The reversal of 1260878690 is 968780621.

It is an interprime number because it is at equal distance from previous prime (1260878687) and next prime (1260878693).

It is a super-2 number, since 2×1260878690² = 3179630141792232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1260878693) 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 7 ways as a sum of consecutive naturals, for example, 416000 + ... + 419019.

It is an arithmetic number, because the mean of its divisors is an integer number (142788420).

Almost surely, 2^1260878690 is an apocalyptic number.

1260878690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1260878690 is a deficient number, since it is larger than the sum of its proper divisors (1023736030).

1260878690 is a wasteful number, since it uses less digits than its factorization.

1260878690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835177.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 1260878690 is about 35508.8536846798. The cubic root of 1260878690 is about 1080.3333133305. Note that the first 4 decimals are identical.

The spelling of 1260878690 in words is "one billion, two hundred sixty million, eight hundred seventy-eight thousand, six hundred ninety".