1394729730 has 24 divisors (see below), whose sum is σ = 3626297532. Its totient is φ = 371927904.

The previous prime is 1394729717. The next prime is 1394729783. The reversal of 1394729730 is 379274931.

It can be written as a sum of positive squares in 2 ways, for example, as 1310512401 + 84217329 = 36201^2 + 9177^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7748409 + ... + 7748588.

Almost surely, 2^1394729730 is an apocalyptic number.

1394729730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1394729730 is an abundant number, since it is smaller than the sum of its proper divisors (2231567802).

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

1394729730 is a wasteful number, since it uses less digits than its factorization.

1394729730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15497010 (or 15497007 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 1394729730 is about 37346.0805172377. The cubic root of 1394729730 is about 1117.2834167297.

The spelling of 1394729730 in words is "one billion, three hundred ninety-four million, seven hundred twenty-nine thousand, seven hundred thirty".