1220770386438 has 32 divisors (see below), whose sum is σ = 2489806964736. Its totient is φ = 398945855808.

The previous prime is 1220770386431. The next prime is 1220770386457. The reversal of 1220770386438 is 8346830770221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220770386431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8271606 + ... + 8417897.

It is an arithmetic number, because the mean of its divisors is an integer number (77806467648).

Almost surely, 2^{1220770386438} is an apocalyptic number.

1220770386438 is an abundant number, since it is smaller than the sum of its proper divisors (1269036578298).

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

1220770386438 is a wasteful number, since it uses less digits than its factorization.

1220770386438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16689748.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 1220770386438 in words is "one trillion, two hundred twenty billion, seven hundred seventy million, three hundred eighty-six thousand, four hundred thirty-eight".