1220648438 has 8 divisors (see below), whose sum is σ = 1831125000. Its totient is φ = 610273440.

The previous prime is 1220648431. The next prime is 1220648441. The reversal of 1220648438 is 8348460221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220648431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23438 + ... + 54686.

It is an arithmetic number, because the mean of its divisors is an integer number (228890625).

Almost surely, 2^1220648438 is an apocalyptic number.

1220648438 is a deficient number, since it is larger than the sum of its proper divisors (610476562).

1220648438 is a wasteful number, since it uses less digits than its factorization.

1220648438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50782.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 1220648438 is about 34937.7795230321. The cubic root of 1220648438 is about 1068.7190068050.

The spelling of 1220648438 in words is "one billion, two hundred twenty million, six hundred forty-eight thousand, four hundred thirty-eight".