1393440142 has 16 divisors (see below), whose sum is σ = 2251395072. Its totient is φ = 644929560.

The previous prime is 1393440131. The next prime is 1393440143. The reversal of 1393440142 is 2410443931.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393440143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487158 + ... + 490009.

It is an arithmetic number, because the mean of its divisors is an integer number (140712192).

Almost surely, 2^1393440142 is an apocalyptic number.

1393440142 is a deficient number, since it is larger than the sum of its proper divisors (857954930).

1393440142 is a wasteful number, since it uses less digits than its factorization.

1393440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977223.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1393440142 is about 37328.8111517096. The cubic root of 1393440142 is about 1116.9389582164.

The spelling of 1393440142 in words is "one billion, three hundred ninety-three million, four hundred forty thousand, one hundred forty-two".