149378690 has 16 divisors (see below), whose sum is σ = 274603392. Its totient is φ = 58479984.

The previous prime is 149378687. The next prime is 149378693. The reversal of 149378690 is 96873941.

It is an interprime number because it is at equal distance from previous prime (149378687) and next prime (149378693).

It is a super-2 number, since 2×149378690² = 44627986052232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (149378693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158444 + ... + 159383.

It is an arithmetic number, because the mean of its divisors is an integer number (17162712).

Almost surely, 2^149378690 is an apocalyptic number.

149378690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149378690 is a deficient number, since it is larger than the sum of its proper divisors (125224702).

149378690 is a wasteful number, since it uses less digits than its factorization.

149378690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317881.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 149378690 is about 12222.0575190923. The cubic root of 149378690 is about 530.5946689405.

The spelling of 149378690 in words is "one hundred forty-nine million, three hundred seventy-eight thousand, six hundred ninety".