1246666890 has 32 divisors (see below), whose sum is σ = 3419429760. Its totient is φ = 284952384.

The previous prime is 1246666867. The next prime is 1246666961. The reversal of 1246666890 is 986666421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2968045 + ... + 2968464.

It is an arithmetic number, because the mean of its divisors is an integer number (106857180).

Almost surely, 2^1246666890 is an apocalyptic number.

1246666890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1246666890 is an abundant number, since it is smaller than the sum of its proper divisors (2172762870).

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

1246666890 is a wasteful number, since it uses less digits than its factorization.

1246666890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936526.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1246666890 is about 35308.1703009374. The cubic root of 1246666890 is about 1076.2590303577.

The spelling of 1246666890 in words is "one billion, two hundred forty-six million, six hundred sixty-six thousand, eight hundred ninety".