2991428 has 12 divisors (see below), whose sum is σ = 5710992. Its totient is φ = 1359720.

The previous prime is 2991421. The next prime is 2991431. The reversal of 2991428 is 8241992.

It is not an unprimeable number, because it can be changed into a prime (2991421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33950 + ... + 34037.

It is an arithmetic number, because the mean of its divisors is an integer number (475916).

2^2991428 is an apocalyptic number.

It is an amenable number.

2991428 is a deficient number, since it is larger than the sum of its proper divisors (2719564).

2991428 is a wasteful number, since it uses less digits than its factorization.

2991428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68002 (or 68000 counting only the distinct ones).

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

The square root of 2991428 is about 1729.5745141508. The cubic root of 2991428 is about 144.0874597299.

The spelling of 2991428 in words is "two million, nine hundred ninety-one thousand, four hundred twenty-eight".