1228901287 has 16 divisors (see below), whose sum is σ = 1345324032. Its totient is φ = 1117503360.

The previous prime is 1228901281. The next prime is 1228901291. The reversal of 1228901287 is 7821098221.

It is a cyclic number.

It is not a de Polignac number, because 1228901287 - 2¹¹ = 1228899239 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 (1228901281) 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, 413268 + ... + 416230.

It is an arithmetic number, because the mean of its divisors is an integer number (84082752).

Almost surely, 2^1228901287 is an apocalyptic number.

1228901287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1228901287 is a deficient number, since it is larger than the sum of its proper divisors (116422745).

1228901287 is a wasteful number, since it uses less digits than its factorization.

1228901287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1228901287 is about 35055.6883686514. The cubic root of 1228901287 is about 1071.1221485135.

The spelling of 1228901287 in words is "one billion, two hundred twenty-eight million, nine hundred one thousand, two hundred eighty-seven".