905097620 has 72 divisors (see below), whose sum is σ = 2215742760. Its totient is φ = 309657600.

The previous prime is 905097617. The next prime is 905097643. The reversal of 905097620 is 26790509.

It can be written as a sum of positive squares in 4 ways, for example, as 10010896 + 895086724 = 3164^2 + 29918^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753020 + ... + 754220.

It is an arithmetic number, because the mean of its divisors is an integer number (30774205).

Almost surely, 2^905097620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 905097620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1107871380).

905097620 is an abundant number, since it is smaller than the sum of its proper divisors (1310645140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

905097620 is a wasteful number, since it uses less digits than its factorization.

905097620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1984 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 905097620 is about 30084.8403685311. The cubic root of 905097620 is about 967.3088049479.

The spelling of 905097620 in words is "nine hundred five million, ninety-seven thousand, six hundred twenty".