1420651538 has 8 divisors (see below), whose sum is σ = 2171184588. Its totient is φ = 696923344.

The previous prime is 1420651537. The next prime is 1420651541. The reversal of 1420651538 is 8351560241.

It can be written as a sum of positive squares in 2 ways, for example, as 1384807369 + 35844169 = 37213^2 + 5987^2 .

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

It is a super-4 number, since 4×1420651538⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1420651498 and 1420651507.

It is not an unprimeable number, because it can be changed into a prime (1420651537) 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, 6701081 + ... + 6701292.

Almost surely, 2^1420651538 is an apocalyptic number.

1420651538 is a deficient number, since it is larger than the sum of its proper divisors (750533050).

1420651538 is a wasteful number, since it uses less digits than its factorization.

1420651538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402428.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1420651538 is about 37691.5313830574. The cubic root of 1420651538 is about 1124.1627450801.

The spelling of 1420651538 in words is "one billion, four hundred twenty million, six hundred fifty-one thousand, five hundred thirty-eight".