4628991 has 4 divisors (see below), whose sum is σ = 6171992. Its totient is φ = 3085992.

The previous prime is 4628977. The next prime is 4628999. The reversal of 4628991 is 1998264.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4628991 - 2⁹ = 4628479 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4628999) 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, 771496 + ... + 771501.

It is an arithmetic number, because the mean of its divisors is an integer number (1542998).

Almost surely, 2^4628991 is an apocalyptic number.

4628991 is a deficient number, since it is larger than the sum of its proper divisors (1543001).

4628991 is a wasteful number, since it uses less digits than its factorization.

4628991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543000.

The product of its digits is 31104, while the sum is 39.

The square root of 4628991 is about 2151.5090053263. The cubic root of 4628991 is about 166.6590027587.

It can be divided in two parts, 462 and 8991, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 4628991 in words is "four million, six hundred twenty-eight thousand, nine hundred ninety-one".