1390432239042 has 64 divisors (see below), whose sum is σ = 3467404800000. Its totient is φ = 361114462080.

The previous prime is 1390432238929. The next prime is 1390432239071. The reversal of 1390432239042 is 2409322340931.

It is a super-2 number, since 2×1390432239042² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1390432238985 and 1390432239003.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4545334 + ... + 4841582.

It is an arithmetic number, because the mean of its divisors is an integer number (54178200000).

Almost surely, 2^{1390432239042} is an apocalyptic number.

1390432239042 is an abundant number, since it is smaller than the sum of its proper divisors (2076972560958).

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

1390432239042 is a wasteful number, since it uses less digits than its factorization.

1390432239042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306431.

The product of its (nonzero) digits is 279936, while the sum is 42.

Adding to 1390432239042 its reverse (2409322340931), we get a palindrome (3799754579973).

The spelling of 1390432239042 in words is "one trillion, three hundred ninety billion, four hundred thirty-two million, two hundred thirty-nine thousand, forty-two".