263730390 has 192 divisors, whose sum is σ = 810819072. Its totient is φ = 53729280.

The previous prime is 263730349. The next prime is 263730419. The reversal of 263730390 is 93037362.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2464717 + ... + 2464823.

It is an arithmetic number, because the mean of its divisors is an integer number (4223016).

Almost surely, 2^263730390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263730390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405409536).

263730390 is an abundant number, since it is smaller than the sum of its proper divisors (547088682).

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

263730390 is a wasteful number, since it uses less digits than its factorization.

263730390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 33.

The square root of 263730390 is about 16239.7780157242. The cubic root of 263730390 is about 641.2884119879.

The spelling of 263730390 in words is "two hundred sixty-three million, seven hundred thirty thousand, three hundred ninety".