1428017731 has 16 divisors (see below), whose sum is σ = 1763294400. Its totient is φ = 1152009600.

The previous prime is 1428017711. The next prime is 1428017749. The reversal of 1428017731 is 1377108241.

It is not a de Polignac number, because 1428017731 - 2¹¹ = 1428015683 is a prime.

It is a super-2 number, since 2×1428017731² = 4078469280100776722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1428017711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116620 + ... + 128281.

It is an arithmetic number, because the mean of its divisors is an integer number (110205900).

Almost surely, 2^1428017731 is an apocalyptic number.

1428017731 is a deficient number, since it is larger than the sum of its proper divisors (335276669).

1428017731 is an equidigital number, since it uses as much as digits as its factorization.

1428017731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244939 (or 244925 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1428017731 is about 37789.1218606625. The cubic root of 1428017731 is about 1126.1023548069.

The spelling of 1428017731 in words is "one billion, four hundred twenty-eight million, seventeen thousand, seven hundred thirty-one".