905121428 has 12 divisors (see below), whose sum is σ = 1585812480. Its totient is φ = 452032152.

The previous prime is 905121421. The next prime is 905121431. The reversal of 905121428 is 824121509.

It is a junction number, because it is equal to n+sod(n) for n = 905121394 and 905121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905121421) 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, 128276 + ... + 135147.

It is an arithmetic number, because the mean of its divisors is an integer number (132151040).

Almost surely, 2^905121428 is an apocalyptic number.

It is an amenable number.

905121428 is a deficient number, since it is larger than the sum of its proper divisors (680691052).

905121428 is a wasteful number, since it uses less digits than its factorization.

905121428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264286 (or 264284 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 905121428 is about 30085.2360469384. The cubic root of 905121428 is about 967.3172863483.

The spelling of 905121428 in words is "nine hundred five million, one hundred twenty-one thousand, four hundred twenty-eight".