1478890 has 32 divisors (see below), whose sum is σ = 3129984. Its totient is φ = 492480.

The previous prime is 1478887. The next prime is 1478909. The reversal of 1478890 is 988741.

1478890 = 25² + 26² + ... + 164².

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305 + ... + 2875.

It is an arithmetic number, because the mean of its divisors is an integer number (97812).

2^1478890 is an apocalyptic number.

1478890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1478890 is an abundant number, since it is smaller than the sum of its proper divisors (1651094).

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

1478890 is a wasteful number, since it uses less digits than its factorization.

1478890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1478890 is about 1216.0962132989. The cubic root of 1478890 is about 113.9318870845.

It can be divided in two parts, 14788 and 90, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 1478890 in words is "one million, four hundred seventy-eight thousand, eight hundred ninety".