63426740 has 48 divisors (see below), whose sum is σ = 145106640. Its totient is φ = 23147520.

The previous prime is 63426733. The next prime is 63426757. The reversal of 63426740 is 4762436.

It can be written as a sum of positive squares in 8 ways, for example, as 16613776 + 46812964 = 4076^2 + 6842^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63426697 and 63426706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21770 + ... + 24510.

It is an arithmetic number, because the mean of its divisors is an integer number (3023055).

Almost surely, 2^63426740 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 63426740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72553320).

63426740 is an abundant number, since it is smaller than the sum of its proper divisors (81679900).

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

63426740 is a wasteful number, since it uses less digits than its factorization.

63426740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 63426740 is about 7964.0906574448. The cubic root of 63426740 is about 398.8021246509.

The spelling of 63426740 in words is "sixty-three million, four hundred twenty-six thousand, seven hundred forty".