1438394154 has 32 divisors (see below), whose sum is σ = 2901878784. Its totient is φ = 475302000.

The previous prime is 1438394147. The next prime is 1438394179. The reversal of 1438394154 is 4514938341.

It is a super-2 number, since 2×1438394154² = 4137955484522751432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333697 + ... + 337979.

It is an arithmetic number, because the mean of its divisors is an integer number (90683712).

Almost surely, 2^1438394154 is an apocalyptic number.

1438394154 is an abundant number, since it is smaller than the sum of its proper divisors (1463484630).

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

1438394154 is a wasteful number, since it uses less digits than its factorization.

1438394154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762.

The product of its digits is 207360, while the sum is 42.

The square root of 1438394154 is about 37926.1671409068. The cubic root of 1438394154 is about 1128.8233121504.

The spelling of 1438394154 in words is "one billion, four hundred thirty-eight million, three hundred ninety-four thousand, one hundred fifty-four".