1247760478 has 24 divisors (see below), whose sum is σ = 1939329000. Its totient is φ = 602082000.

The previous prime is 1247760473. The next prime is 1247760499. The reversal of 1247760478 is 8740677421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247760473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958428 + ... + 959728.

It is an arithmetic number, because the mean of its divisors is an integer number (80805375).

Almost surely, 2^1247760478 is an apocalyptic number.

1247760478 is a deficient number, since it is larger than the sum of its proper divisors (691568522).

1247760478 is a wasteful number, since it uses less digits than its factorization.

1247760478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 46.

The square root of 1247760478 is about 35323.6532368893. The cubic root of 1247760478 is about 1076.5736399202.

The spelling of 1247760478 in words is "one billion, two hundred forty-seven million, seven hundred sixty thousand, four hundred seventy-eight".