1438620234291 has 24 divisors (see below), whose sum is σ = 2107499606784. Its totient is φ = 945471070320.

The previous prime is 1438620234283. The next prime is 1438620234313. The reversal of 1438620234291 is 1924320268341.

1438620234291 is a `hidden beast` number, since 1 + 438 + 6 + 202 + 3 + 4 + 2 + 9 + 1 = 666.

It is not a de Polignac number, because 1438620234291 - 2³ = 1438620234283 is a prime.

It is a super-2 number, since 2×1438620234291² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438620234211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6125860 + ... + 6356366.

It is an arithmetic number, because the mean of its divisors is an integer number (87812483616).

Almost surely, 2^{1438620234291} is an apocalyptic number.

1438620234291 is a deficient number, since it is larger than the sum of its proper divisors (668879372493).

1438620234291 is a wasteful number, since it uses less digits than its factorization.

1438620234291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240351 (or 240348 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 1438620234291 in words is "one trillion, four hundred thirty-eight billion, six hundred twenty million, two hundred thirty-four thousand, two hundred ninety-one".