1438894770 has 16 divisors (see below), whose sum is σ = 3453347520. Its totient is φ = 383705264.

The previous prime is 1438894763. The next prime is 1438894771. The reversal of 1438894770 is 774988341.

1438894770 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1438894771) 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, 23981550 + ... + 23981609.

It is an arithmetic number, because the mean of its divisors is an integer number (215834220).

Almost surely, 2^1438894770 is an apocalyptic number.

1438894770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438894770 is an abundant number, since it is smaller than the sum of its proper divisors (2014452750).

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

1438894770 is a wasteful number, since it uses less digits than its factorization.

1438894770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47963169.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 1438894770 is about 37932.7664427471. The cubic root of 1438894770 is about 1128.9542548091.

The spelling of 1438894770 in words is "one billion, four hundred thirty-eight million, eight hundred ninety-four thousand, seven hundred seventy".