1428780934 has 16 divisors (see below), whose sum is σ = 2490854400. Its totient is φ = 601955784.

The previous prime is 1428780919. The next prime is 1428780949. The reversal of 1428780934 is 4390878241.

It is an interprime number because it is at equal distance from previous prime (1428780919) and next prime (1428780949).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864054 + ... + 865705.

It is an arithmetic number, because the mean of its divisors is an integer number (155678400).

Almost surely, 2^1428780934 is an apocalyptic number.

1428780934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1428780934 is a deficient number, since it is larger than the sum of its proper divisors (1062073466).

1428780934 is a wasteful number, since it uses less digits than its factorization.

1428780934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729827.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 1428780934 is about 37799.2186956291. The cubic root of 1428780934 is about 1126.3029339296.

The spelling of 1428780934 in words is "one billion, four hundred twenty-eight million, seven hundred eighty thousand, nine hundred thirty-four".