1385280842 has 64 divisors (see below), whose sum is σ = 2450736000. Its totient is φ = 585446400.

The previous prime is 1385280833. The next prime is 1385280847. The reversal of 1385280842 is 2480825831.

It is a super-2 number, since 2×1385280842² = 3838006022424457928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1385280842.

It is not an unprimeable number, because it can be changed into a prime (1385280847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3085034 + ... + 3085482.

It is an arithmetic number, because the mean of its divisors is an integer number (38292750).

Almost surely, 2^1385280842 is an apocalyptic number.

1385280842 is a deficient number, since it is larger than the sum of its proper divisors (1065455158).

1385280842 is a wasteful number, since it uses less digits than its factorization.

1385280842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 1385280842 is about 37219.3611175689. The cubic root of 1385280842 is about 1114.7546074624.

The spelling of 1385280842 in words is "one billion, three hundred eighty-five million, two hundred eighty thousand, eight hundred forty-two".