1294849840 has 20 divisors (see below), whose sum is σ = 3010526064. Its totient is φ = 517939904.

The previous prime is 1294849793. The next prime is 1294849849. The reversal of 1294849840 is 489484921.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1294849840² = 3353272216296051200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1294849849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8092732 + ... + 8092891.

Almost surely, 2^1294849840 is an apocalyptic number.

1294849840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1294849840 is an abundant number, since it is smaller than the sum of its proper divisors (1715676224).

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

1294849840 is a wasteful number, since it uses less digits than its factorization.

1294849840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16185636 (or 16185630 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 1294849840 is about 35984.0220097754. The cubic root of 1294849840 is about 1089.9497325527.

The spelling of 1294849840 in words is "one billion, two hundred ninety-four million, eight hundred forty-nine thousand, eight hundred forty".