1428557157 has 6 divisors (see below), whose sum is σ = 2063471462. Its totient is φ = 952371432.

The previous prime is 1428557153. The next prime is 1428557171. The reversal of 1428557157 is 7517558241.

1428557157 is a `hidden beast` number, since 1 + 4 + 28 + 5 + 571 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 833245956 + 595311201 = 28866^2 + 24399^2 .

It is not a de Polignac number, because 1428557157 - 2² = 1428557153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428557153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79364278 + ... + 79364295.

Almost surely, 2^1428557157 is an apocalyptic number.

It is an amenable number.

1428557157 is a deficient number, since it is larger than the sum of its proper divisors (634914305).

1428557157 is a wasteful number, since it uses less digits than its factorization.

1428557157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158728579 (or 158728576 counting only the distinct ones).

The product of its digits is 392000, while the sum is 45.

The square root of 1428557157 is about 37796.2585053071. The cubic root of 1428557157 is about 1126.2441299881.

The spelling of 1428557157 in words is "one billion, four hundred twenty-eight million, five hundred fifty-seven thousand, one hundred fifty-seven".