1220735078 has 4 divisors (see below), whose sum is σ = 1831102620. Its totient is φ = 610367538.

The previous prime is 1220735063. The next prime is 1220735119. The reversal of 1220735078 is 8705370221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305183768 + ... + 305183771.

It is an arithmetic number, because the mean of its divisors is an integer number (457775655).

Almost surely, 2^1220735078 is an apocalyptic number.

1220735078 is a deficient number, since it is larger than the sum of its proper divisors (610367542).

1220735078 is an equidigital number, since it uses as much as digits as its factorization.

1220735078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610367541.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1220735078 is about 34939.0194195544. The cubic root of 1220735078 is about 1068.7442916239.

The spelling of 1220735078 in words is "one billion, two hundred twenty million, seven hundred thirty-five thousand, seventy-eight".