1878428739 has 8 divisors (see below), whose sum is σ = 2732260032. Its totient is φ = 1138441640.

The previous prime is 1878428737. The next prime is 1878428777. The reversal of 1878428739 is 9378248781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1878428739 - 2¹ = 1878428737 is a prime.

It is a super-2 number, since 2×1878428739² = 7056989055002260242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1878428731) 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, 28461009 + ... + 28461074.

It is an arithmetic number, because the mean of its divisors is an integer number (341532504).

Almost surely, 2^1878428739 is an apocalyptic number.

1878428739 is a deficient number, since it is larger than the sum of its proper divisors (853831293).

1878428739 is a wasteful number, since it uses less digits than its factorization.

1878428739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56922097.

The product of its digits is 5419008, while the sum is 57.

The square root of 1878428739 is about 43340.8437735123. The cubic root of 1878428739 is about 1233.8572236868.

The spelling of 1878428739 in words is "one billion, eight hundred seventy-eight million, four hundred twenty-eight thousand, seven hundred thirty-nine".