1428837291 has 24 divisors (see below), whose sum is σ = 2380366560. Its totient is φ = 808983936.

The previous prime is 1428837287. The next prime is 1428837307. The reversal of 1428837291 is 1927388241.

It is a happy number.

It is not a de Polignac number, because 1428837291 - 2² = 1428837287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428837391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97170 + ... + 110903.

It is an arithmetic number, because the mean of its divisors is an integer number (99181940).

Almost surely, 2^1428837291 is an apocalyptic number.

1428837291 is a deficient number, since it is larger than the sum of its proper divisors (951529269).

1428837291 is a wasteful number, since it uses less digits than its factorization.

1428837291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208195 (or 208192 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1428837291 is about 37799.9641666497. The cubic root of 1428837291 is about 1126.3177424092.

The spelling of 1428837291 in words is "one billion, four hundred twenty-eight million, eight hundred thirty-seven thousand, two hundred ninety-one".