1378438554 has 16 divisors (see below), whose sum is σ = 2759031360. Its totient is φ = 459120480.

The previous prime is 1378438549. The next prime is 1378438559. The reversal of 1378438554 is 4558348731.

It is an interprime number because it is at equal distance from previous prime (1378438549) and next prime (1378438559).

It is a super-2 number, since 2×1378438554² = 3800185694307221832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378438559) 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, 81382 + ... + 96849.

It is an arithmetic number, because the mean of its divisors is an integer number (172439460).

Almost surely, 2^1378438554 is an apocalyptic number.

1378438554 is an abundant number, since it is smaller than the sum of its proper divisors (1380592806).

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

1378438554 is a wasteful number, since it uses less digits than its factorization.

1378438554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179525.

The product of its digits is 1612800, while the sum is 48.

The square root of 1378438554 is about 37127.3289370512. The cubic root of 1378438554 is about 1112.9162161688.

The spelling of 1378438554 in words is "one billion, three hundred seventy-eight million, four hundred thirty-eight thousand, five hundred fifty-four".