2428991 has 2 divisors, whose sum is σ = 2428992. Its totient is φ = 2428990.

The previous prime is 2428931. The next prime is 2428997. The reversal of 2428991 is 1998242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2428991 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2428997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1214495 + 1214496.

It is an arithmetic number, because the mean of its divisors is an integer number (1214496).

2^2428991 is an apocalyptic number.

2428991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2428991 is an equidigital number, since it uses as much as digits as its factorization.

2428991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 2428991 is about 1558.5220563085. The cubic root of 2428991 is about 134.4235318478.

The spelling of 2428991 in words is "two million, four hundred twenty-eight thousand, nine hundred ninety-one".