978400143 has 12 divisors (see below), whose sum is σ = 1615136848. Its totient is φ = 559085760.

The previous prime is 978400109. The next prime is 978400177. The reversal of 978400143 is 341004879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (978400109) and next prime (978400177).

It is not a de Polignac number, because 978400143 - 2¹³ = 978391951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 978400098 and 978400107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978404143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7765018 + ... + 7765143.

Almost surely, 2^978400143 is an apocalyptic number.

978400143 is a deficient number, since it is larger than the sum of its proper divisors (636736705).

978400143 is a wasteful number, since it uses less digits than its factorization.

978400143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15530174 (or 15530171 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 978400143 is about 31279.3884690862. The cubic root of 978400143 is about 992.7475771834.

The spelling of 978400143 in words is "nine hundred seventy-eight million, four hundred thousand, one hundred forty-three".