1947426144 has 48 divisors (see below), whose sum is σ = 5114294640. Its totient is φ = 648849920.

The previous prime is 1947426137. The next prime is 1947426149. The reversal of 1947426144 is 4416247491.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1947426096 and 1947426105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947426149) 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, 364162 + ... + 369470.

It is an arithmetic number, because the mean of its divisors is an integer number (106547805).

Almost surely, 2^1947426144 is an apocalyptic number.

It is an amenable number.

1947426144 is an abundant number, since it is smaller than the sum of its proper divisors (3166868496).

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

1947426144 is a wasteful number, since it uses less digits than its factorization.

1947426144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143 (or 9135 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 1947426144 is about 44129.6515281959. The cubic root of 1947426144 is about 1248.7830596828.

The spelling of 1947426144 in words is "one billion, nine hundred forty-seven million, four hundred twenty-six thousand, one hundred forty-four".