1378730526 has 32 divisors (see below), whose sum is σ = 2808069120. Its totient is φ = 451163904.

The previous prime is 1378730491. The next prime is 1378730527. The reversal of 1378730526 is 6250378731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378730527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303246 + ... + 307758.

It is an arithmetic number, because the mean of its divisors is an integer number (87752160).

Almost surely, 2^1378730526 is an apocalyptic number.

1378730526 is an abundant number, since it is smaller than the sum of its proper divisors (1429338594).

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

1378730526 is a wasteful number, since it uses less digits than its factorization.

1378730526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 1378730526 is about 37131.2607650212. The cubic root of 1378730526 is about 1112.9947875429.

The spelling of 1378730526 in words is "one billion, three hundred seventy-eight million, seven hundred thirty thousand, five hundred twenty-six".