1478769157 has 8 divisors (see below), whose sum is σ = 1566397656. Its totient is φ = 1391212032.

The previous prime is 1478769139. The next prime is 1478769167. The reversal of 1478769157 is 7519678741.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 1478325601 = 666^2 + 38449^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1478769157 - 2⁷ = 1478769029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1478769098 and 1478769107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478769167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28243 + ... + 61279.

It is an arithmetic number, because the mean of its divisors is an integer number (195799707).

Almost surely, 2^1478769157 is an apocalyptic number.

1478769157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1478769157 is a deficient number, since it is larger than the sum of its proper divisors (87628499).

1478769157 is a wasteful number, since it uses less digits than its factorization.

1478769157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35687.

The product of its digits is 2963520, while the sum is 55.

The square root of 1478769157 is about 38454.7676758032. The cubic root of 1478769157 is about 1139.2878380075.

The spelling of 1478769157 in words is "one billion, four hundred seventy-eight million, seven hundred sixty-nine thousand, one hundred fifty-seven".