6428629 has 4 divisors (see below), whose sum is σ = 6578176. Its totient is φ = 6279084.

The previous prime is 6428627. The next prime is 6428647. The reversal of 6428629 is 9268246.

6428629 = T₂₄₉ + T₂₅₀ + ... + T₃₇₇.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6428629 - 2¹ = 6428627 is a prime.

It is an Ulam 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 (6428623) 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, 74709 + ... + 74794.

It is an arithmetic number, because the mean of its divisors is an integer number (1644544).

Almost surely, 2^6428629 is an apocalyptic number.

It is an amenable number.

6428629 is a deficient number, since it is larger than the sum of its proper divisors (149547).

6428629 is a wasteful number, since it uses less digits than its factorization.

6428629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149546.

The product of its digits is 41472, while the sum is 37.

The square root of 6428629 is about 2535.4741173990. The cubic root of 6428629 is about 185.9399833343.

The spelling of 6428629 in words is "six million, four hundred twenty-eight thousand, six hundred twenty-nine".