428293501 has 4 divisors (see below), whose sum is σ = 432296352. Its totient is φ = 424290652.

The previous prime is 428293493. The next prime is 428293507. The reversal of 428293501 is 105392824.

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 428293501 - 2³ = 428293493 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 (428293507) 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, 2001265 + ... + 2001478.

It is an arithmetic number, because the mean of its divisors is an integer number (108074088).

Almost surely, 2^428293501 is an apocalyptic number.

It is an amenable number.

428293501 is a deficient number, since it is larger than the sum of its proper divisors (4002851).

428293501 is a wasteful number, since it uses less digits than its factorization.

428293501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002850.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 428293501 is about 20695.2531030669. The cubic root of 428293501 is about 753.7844281674.

The spelling of 428293501 in words is "four hundred twenty-eight million, two hundred ninety-three thousand, five hundred one".