263435140 has 12 divisors (see below), whose sum is σ = 553213836. Its totient is φ = 105374048.

The previous prime is 263435131. The next prime is 263435147. The reversal of 263435140 is 41534362.

It can be written as a sum of positive squares in 2 ways, for example, as 208051776 + 55383364 = 14424^2 + 7442^2 .

It is a junction number, because it is equal to n+sod(n) for n = 263435099 and 263435108.

It is not an unprimeable number, because it can be changed into a prime (263435147) 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, 6585859 + ... + 6585898.

It is an arithmetic number, because the mean of its divisors is an integer number (46101153).

Almost surely, 2^263435140 is an apocalyptic number.

263435140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263435140 is an abundant number, since it is smaller than the sum of its proper divisors (289778696).

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

263435140 is a wasteful number, since it uses less digits than its factorization.

263435140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13171766 (or 13171764 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 263435140 is about 16230.6851364938. The cubic root of 263435140 is about 641.0490120663.

The spelling of 263435140 in words is "two hundred sixty-three million, four hundred thirty-five thousand, one hundred forty".