1240348638 has 16 divisors (see below), whose sum is σ = 2494558080. Its totient is φ = 411139416.

The previous prime is 1240348619. The next prime is 1240348643. The reversal of 1240348638 is 8368430421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1240348596 and 1240348605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576370 + ... + 578517.

It is an arithmetic number, because the mean of its divisors is an integer number (155909880).

Almost surely, 2^1240348638 is an apocalyptic number.

1240348638 is an abundant number, since it is smaller than the sum of its proper divisors (1254209442).

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

1240348638 is a wasteful number, since it uses less digits than its factorization.

1240348638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155071.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 1240348638 is about 35218.5837023580. The cubic root of 1240348638 is about 1074.4377483089.

The spelling of 1240348638 in words is "one billion, two hundred forty million, three hundred forty-eight thousand, six hundred thirty-eight".