1307478890 has 8 divisors (see below), whose sum is σ = 2353462020. Its totient is φ = 522991552.

The previous prime is 1307478883. The next prime is 1307478899. The reversal of 1307478890 is 988747031.

It can be written as a sum of positive squares in 2 ways, for example, as 1236295921 + 71182969 = 35161^2 + 8437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1307478899) 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, 65373935 + ... + 65373954.

Almost surely, 2^1307478890 is an apocalyptic number.

1307478890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1307478890 is a deficient number, since it is larger than the sum of its proper divisors (1045983130).

1307478890 is a wasteful number, since it uses less digits than its factorization.

1307478890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130747896.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1307478890 is about 36159.0775601370. The cubic root of 1307478890 is about 1093.4818072664.

The spelling of 1307478890 in words is "one billion, three hundred seven million, four hundred seventy-eight thousand, eight hundred ninety".