402978145 has 8 divisors (see below), whose sum is σ = 499173120. Its totient is φ = 311982960.

The previous prime is 402978119. The next prime is 402978151. The reversal of 402978145 is 541879204.

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

It is not a de Polignac number, because 402978145 - 2⁹ = 402977633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402978098 and 402978107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299775 + ... + 1300084.

It is an arithmetic number, because the mean of its divisors is an integer number (62396640).

Almost surely, 2^402978145 is an apocalyptic number.

It is an amenable number.

402978145 is a deficient number, since it is larger than the sum of its proper divisors (96194975).

402978145 is a wasteful number, since it uses less digits than its factorization.

402978145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599895.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 402978145 is about 20074.3155549573. The cubic root of 402978145 is about 738.6303768830.

The spelling of 402978145 in words is "four hundred two million, nine hundred seventy-eight thousand, one hundred forty-five".