1240378738 has 8 divisors (see below), whose sum is σ = 1860720300. Its totient is φ = 620138640.

The previous prime is 1240378723. The next prime is 1240378751. The reversal of 1240378738 is 8378730421.

It can be written as a sum of positive squares in 2 ways, for example, as 1131447769 + 108930969 = 33637^2 + 10437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1240378694 and 1240378703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26008 + ... + 56188.

Almost surely, 2^1240378738 is an apocalyptic number.

1240378738 is a deficient number, since it is larger than the sum of its proper divisors (620341562).

1240378738 is a wasteful number, since it uses less digits than its factorization.

1240378738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50732.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 1240378738 is about 35219.0110309759. The cubic root of 1240378738 is about 1074.4464394982.

The spelling of 1240378738 in words is "one billion, two hundred forty million, three hundred seventy-eight thousand, seven hundred thirty-eight".