1394442770 has 16 divisors (see below), whose sum is σ = 2868568128. Its totient is φ = 478094640.

The previous prime is 1394442761. The next prime is 1394442779. The reversal of 1394442770 is 772444931.

It is an interprime number because it is at equal distance from previous prime (1394442761) and next prime (1394442779).

It is not an unprimeable number, because it can be changed into a prime (1394442779) 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, 9960236 + ... + 9960375.

It is an arithmetic number, because the mean of its divisors is an integer number (179285508).

Almost surely, 2^1394442770 is an apocalyptic number.

1394442770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1394442770 is an abundant number, since it is smaller than the sum of its proper divisors (1474125358).

1394442770 is a wasteful number, since it uses less digits than its factorization.

1394442770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920625.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 1394442770 is about 37342.2384171062. The cubic root of 1394442770 is about 1117.2067859595.

The spelling of 1394442770 in words is "one billion, three hundred ninety-four million, four hundred forty-two thousand, seven hundred seventy".