270421638 has 16 divisors (see below), whose sum is σ = 548252976. Its totient is φ = 88905600.

The previous prime is 270421637. The next prime is 270421673. The reversal of 270421638 is 836124072.

It is a junction number, because it is equal to n+sod(n) for n = 270421599 and 270421608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (270421631) 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, 308263 + ... + 309138.

It is an arithmetic number, because the mean of its divisors is an integer number (34265811).

Almost surely, 2^270421638 is an apocalyptic number.

270421638 is an abundant number, since it is smaller than the sum of its proper divisors (277831338).

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

270421638 is a wasteful number, since it uses less digits than its factorization.

270421638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617479.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 270421638 is about 16444.5017559061. The cubic root of 270421638 is about 646.6666733388. Note that the first 4 decimals are identical.

It can be divided in two parts, 27042 and 1638, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 270421638 in words is "two hundred seventy million, four hundred twenty-one thousand, six hundred thirty-eight".