1978503142 has 32 divisors (see below), whose sum is σ = 3819423744. Its totient is φ = 745977600.

The previous prime is 1978503139. The next prime is 1978503161. The reversal of 1978503142 is 2413058791.

It is a junction number, because it is equal to n+sod(n) for n = 1978503095 and 1978503104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202443 + ... + 211990.

It is an arithmetic number, because the mean of its divisors is an integer number (119356992).

Almost surely, 2^1978503142 is an apocalyptic number.

1978503142 is a deficient number, since it is larger than the sum of its proper divisors (1840920602).

1978503142 is a wasteful number, since it uses less digits than its factorization.

1978503142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414484.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1978503142 is about 44480.3680515348. The cubic root of 1978503142 is about 1255.3907222977.

The spelling of 1978503142 in words is "one billion, nine hundred seventy-eight million, five hundred three thousand, one hundred forty-two".