278323485490 has 32 divisors (see below), whose sum is σ = 513954051264. Its totient is φ = 108480891840.

The previous prime is 278323485463. The next prime is 278323485493. The reversal of 278323485490 is 94584323872.

It is not an unprimeable number, because it can be changed into a prime (278323485493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066824 + ... + 2197363.

It is an arithmetic number, because the mean of its divisors is an integer number (16061064102).

Almost surely, 2^278323485490 is an apocalyptic number.

278323485490 is a deficient number, since it is larger than the sum of its proper divisors (235630565774).

278323485490 is a wasteful number, since it uses less digits than its factorization.

278323485490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264362.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 278323485490 in words is "two hundred seventy-eight billion, three hundred twenty-three million, four hundred eighty-five thousand, four hundred ninety".