1426660040 has 32 divisors (see below), whose sum is σ = 3456908280. Its totient is φ = 526766592.

The previous prime is 1426659979. The next prime is 1426660073. The reversal of 1426660040 is 400666241.

It can be written as a sum of positive squares in 4 ways, for example, as 1185975844 + 240684196 = 34438^2 + 15514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1426659985 and 1426660012.

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, 1371269 + ... + 1372308.

Almost surely, 2^1426660040 is an apocalyptic number.

1426660040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1426660040 is an abundant number, since it is smaller than the sum of its proper divisors (2030248240).

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

1426660040 is a wasteful number, since it uses less digits than its factorization.

1426660040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743601 (or 2743597 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1426660040 is about 37771.1535434119. The cubic root of 1426660040 is about 1125.7453602146.

The spelling of 1426660040 in words is "one billion, four hundred twenty-six million, six hundred sixty thousand, forty".