1528868431 has 2 divisors, whose sum is σ = 1528868432. Its totient is φ = 1528868430.

The previous prime is 1528868413. The next prime is 1528868479. The reversal of 1528868431 is 1348688251.

Together with previous prime (1528868413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1528868431 - 2⁵ = 1528868399 is a prime.

It is a super-2 number, since 2×1528868431² = 4674877358616803522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1528868401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 764434215 + 764434216.

It is an arithmetic number, because the mean of its divisors is an integer number (764434216).

Almost surely, 2^1528868431 is an apocalyptic number.

1528868431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1528868431 is an equidigital number, since it uses as much as digits as its factorization.

1528868431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368640, while the sum is 46.

The square root of 1528868431 is about 39100.7471923492. The cubic root of 1528868431 is about 1152.0112080053.

The spelling of 1528868431 in words is "one billion, five hundred twenty-eight million, eight hundred sixty-eight thousand, four hundred thirty-one".